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Commit 5329b3a6 authored by unknown's avatar unknown
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WL#2269 Enable query cache for NDB part 2 

-This is mostly fixes for correct behaviour when using query cache + transactions + the thread that
fetches commit count from NDB at regular intervals. The major fix is to add a
list in thd_ndb, that keeps a list of NDB_SHARE's that were modified by
transaction and then "clearing" them in ndbcluster_commit.


mysql-test/r/ndb_cache2.result:
  Updated test cases for the ndb_util thread, more simultaneous tables and more tesst
mysql-test/t/ndb_cache2.test:
  Updated test cases for the ndb_util thread, more simultaneous tables and more advanced tesst
sql/ha_ndbcluster.cc:
  Add table changed during transaction to list of changed tables in Thd_ndb, this list is then used in ndbcluster_commit to invalidate the cached commit_count in share
  Fix so that ndb_util_thread uses milliseconds "sleeps"
  Changed so that ndb_commit_count uses the commit_count from share if available
sql/ha_ndbcluster.h:
  Add commit_count_lock to NBD_SHARE, use for detecting simultaneous attempts to update commit_count
  Add list of tables changed by transaction to Thd_ndb
  Change check_ndb_connection to take thd as argument, use current_thd as default
  Added m_rows_changed variable to keep track of if this handler has modified any records within the transaction
sql/set_var.cc:
  Change format of code
  Sort sys__ variables in aplha order
parent 82095bc4
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Showing with 947 additions and 164 deletions
mysql-test/r/ndb_cache2.result
View file @ 5329b3a6
drop table if exists t1;
drop table if exists t1, t2, t3, t4, t5;
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
set GLOBAL ndb_cache_check_time=1;
set GLOBAL ndb_cache_check_time=100;
reset query cache;
flush status;
CREATE TABLE t1 ( pk int not null primary key,
a int, b int not null, c varchar(20)) ENGINE=ndbcluster;
CREATE TABLE t1 (
pk int not null primary key,
a1 int,
b1 int not null,
c1 varchar(20)
) ENGINE=ndb;
CREATE TABLE t2 (
pk int not null primary key,
a2 int,
b2 int not null
) ENGINE=ndb;
CREATE TABLE t3 (
pk int not null primary key,
a3 int,
b3 int not null,
c3 int not null,
d3 varchar(20)
) ENGINE=ndb;
CREATE TABLE t4 (
a4 int,
b4 int not null,
c4 char(20)
) ENGINE=ndbcluster;
CREATE TABLE t5 (
pk int not null primary key,
a5 int,
b5 int not null,
c5 varchar(255)
) ENGINE=ndbcluster;
insert into t1 value (1, 2, 3, 'First row');
insert into t2 value (1, 2, 3);
insert into t3 value (1, 2, 3, 4, '3 - First row');
insert into t4 value (2, 3, '4 - First row');
insert into t5 value (1, 2, 3, '5 - First row');
select * from t1;
pk a b c
pk a1 b1 c1
1 2 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
......@@ -20,14 +51,14 @@ show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1;
pk a b c
pk a1 b1 c1
1 2 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
update t1 set a=3 where pk=1;
update t1 set a1=3 where pk=1;
select * from t1;
pk a b c
pk a1 b1 c1
1 3 3 First row
show status like "Qcache_inserts";
Variable_name Value
......@@ -38,7 +69,7 @@ Qcache_hits 1
insert into t1 value (2, 7, 8, 'Second row');
insert into t1 value (4, 5, 6, 'Fourth row');
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
4 5 6 Fourth row
2 7 8 Second row
1 3 3 First row
......@@ -49,15 +80,15 @@ show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
4 5 6 Fourth row
2 7 8 Second row
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 2
select * from t1 where b=3;
pk a b c
select * from t1 where b1=3;
pk a1 b1 c1
1 3 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
......@@ -65,44 +96,44 @@ Qcache_queries_in_cache 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 2
select * from t1 where b=3;
pk a b c
select * from t1 where b1=3;
pk a1 b1 c1
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 3
delete from t1 where c='Fourth row';
delete from t1 where c1='Fourth row';
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
select * from t1 where b=3;
pk a b c
select * from t1 where b1=3;
pk a1 b1 c1
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 3
use test;
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
2 7 8 Second row
1 3 3 First row
select * from t1 where b=3;
pk a b c
select * from t1 where b1=3;
pk a1 b1 c1
1 3 3 First row
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 4
update t1 set a=4 where b=3;
update t1 set a1=4 where b1=3;
use test;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
2 7 8 Second row
1 4 3 First row
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
2 7 8 Second row
1 4 3 First row
show status like "Qcache_inserts";
......@@ -112,11 +143,11 @@ show status like "Qcache_hits";
Variable_name Value
Qcache_hits 5
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
2 7 8 Second row
1 4 3 First row
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
2 7 8 Second row
1 4 3 First row
show status like "Qcache_queries_in_cache";
......@@ -128,64 +159,463 @@ Qcache_inserts 7
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
select * from t2;
pk a2 b2
1 2 3
select * from t3;
pk a3 b3 c3 d3
1 2 3 4 3 - First row
select * from t4;
a4 b4 c4
2 3 4 - First row
select * from t5;
pk a5 b5 c5
1 2 3 5 - First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
flush status;
begin;
update t1 set a=5 where pk=1;
update t1 set a1=5 where pk=1;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
Qcache_queries_in_cache 4
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 7
Qcache_inserts 0
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
Qcache_hits 0
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
2 7 8 Second row
1 4 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 8
Qcache_inserts 1
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
Qcache_hits 0
commit;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 8
Qcache_inserts 1
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
Qcache_hits 0
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
2 7 8 Second row
1 5 3 First row
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 9
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 7
Qcache_hits 0
select * from t1 order by pk desc;
pk a b c
pk a1 b1 c1
2 7 8 Second row
1 5 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 1
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
flush status;
begin;
update t1 set a1=6 where pk=1;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 4
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 0
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1 order by pk desc;
pk a1 b1 c1
2 7 8 Second row
1 5 3 First row
select * from t1 order by pk desc;
pk a1 b1 c1
2 7 8 Second row
1 5 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 1
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
select * from t1 order by pk desc;
pk a1 b1 c1
2 7 8 Second row
1 6 3 First row
select * from t1 order by pk desc;
pk a1 b1 c1
2 7 8 Second row
1 6 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 1
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
commit;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 1
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
select * from t1 order by pk desc;
pk a1 b1 c1
2 7 8 Second row
1 6 3 First row
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 1
select * from t1 order by pk desc;
pk a1 b1 c1
2 7 8 Second row
1 6 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 2
flush status;
begin;
insert into t1 set pk=5, a1=6, b1=3, c1="New row";
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 4
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 0
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1 where pk=5;
pk a1 b1 c1
select * from t1 order by pk desc;
pk a1 b1 c1
2 7 8 Second row
1 6 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 6
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1 where pk=5;
pk a1 b1 c1
5 6 3 New row
select * from t1 where pk=5;
pk a1 b1 c1
5 6 3 New row
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
2 7 8 Second row
1 6 3 First row
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
2 7 8 Second row
1 6 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 6
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
commit;
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
2 7 8 Second row
1 6 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 3
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
flush status;
begin;
delete from t1 where pk=2;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 4
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 0
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1 where pk=2;
pk a1 b1 c1
2 7 8 Second row
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
2 7 8 Second row
1 6 3 First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 6
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1 where pk=2;
pk a1 b1 c1
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 6 3 First row
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 6 3 First row
select * from t1 where pk=2;
pk a1 b1 c1
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 6
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 2
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
commit;
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 6 3 First row
select * from t1 where pk=2;
pk a1 b1 c1
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 6
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 4
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
flush status;
begin;
update t1 set a1=9 where pk=1;
update t2 set a2=9 where pk=1;
update t3 set a3=9 where pk=1;
update t4 set a4=9 where a4=2;
update t5 set a5=9 where pk=1;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 0
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 6 3 First row
select * from t2;
pk a2 b2
1 2 3
select * from t3;
pk a3 b3 c3 d3
1 2 3 4 3 - First row
select * from t4;
a4 b4 c4
2 3 4 - First row
select * from t5;
pk a5 b5 c5
1 2 3 5 - First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 5
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 9 3 First row
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 9 3 First row
select * from t2;
pk a2 b2
1 9 3
select * from t3;
pk a3 b3 c3 d3
1 9 3 4 3 - First row
select * from t4;
a4 b4 c4
9 3 4 - First row
select * from t5;
pk a5 b5 c5
1 9 3 5 - First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 5
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
commit;
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 9 3 First row
select * from t2;
pk a2 b2
1 9 3
select * from t3;
pk a3 b3 c3 d3
1 9 3 4 3 - First row
select * from t4;
a4 b4 c4
9 3 4 - First row
select * from t5;
pk a5 b5 c5
1 9 3 5 - First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 10
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 9 3 First row
select * from t2;
pk a2 b2
1 9 3
select * from t3;
pk a3 b3 c3 d3
1 9 3 4 3 - First row
select * from t4;
a4 b4 c4
9 3 4 - First row
select * from t5;
pk a5 b5 c5
1 9 3 5 - First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 10
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 5
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 9 3 First row
select * from t2;
pk a2 b2
1 9 3
select * from t3;
pk a3 b3 c3 d3
1 9 3 4 3 - First row
select * from t4;
a4 b4 c4
9 3 4 - First row
select * from t5;
pk a5 b5 c5
1 9 3 5 - First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 10
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 10
select * from t1 order by pk desc;
pk a1 b1 c1
5 6 3 New row
1 9 3 First row
select * from t2;
pk a2 b2
1 9 3
select * from t3;
pk a3 b3 c3 d3
1 9 3 4 3 - First row
select * from t4;
a4 b4 c4
9 3 4 - First row
select * from t5;
pk a5 b5 c5
1 9 3 5 - First row
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 5
show status like "Qcache_inserts";
Variable_name Value
Qcache_inserts 9
Qcache_inserts 10
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 8
drop table t1;
Qcache_hits 15
drop table t1, t2, t3, t4, t5;
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
......
mysql-test/t/ndb_cache2.test
View file @ 5329b3a6
......@@ -2,7 +2,7 @@
-- source include/have_ndb.inc
--disable_warnings
drop table if exists t1;
drop table if exists t1, t2, t3, t4, t5;
--enable_warnings
......@@ -10,19 +10,47 @@ drop table if exists t1;
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
# Turn on thread that will fetch commit count for open tables
set GLOBAL ndb_cache_check_time=1;
set GLOBAL ndb_cache_check_time=100;
reset query cache;
flush status;
# Wait for thread to wake up and start "working"
sleep 20;
# Create test table in NDB
CREATE TABLE t1 ( pk int not null primary key,
a int, b int not null, c varchar(20)) ENGINE=ndbcluster;
# Create test tables in NDB
CREATE TABLE t1 (
pk int not null primary key,
a1 int,
b1 int not null,
c1 varchar(20)
) ENGINE=ndb;
CREATE TABLE t2 (
pk int not null primary key,
a2 int,
b2 int not null
) ENGINE=ndb;
CREATE TABLE t3 (
pk int not null primary key,
a3 int,
b3 int not null,
c3 int not null,
d3 varchar(20)
) ENGINE=ndb;
CREATE TABLE t4 (
a4 int,
b4 int not null,
c4 char(20)
) ENGINE=ndbcluster;
CREATE TABLE t5 (
pk int not null primary key,
a5 int,
b5 int not null,
c5 varchar(255)
) ENGINE=ndbcluster;
insert into t1 value (1, 2, 3, 'First row');
insert into t2 value (1, 2, 3);
insert into t3 value (1, 2, 3, 4, '3 - First row');
insert into t4 value (2, 3, '4 - First row');
insert into t5 value (1, 2, 3, '5 - First row');
# Perform one query which should be inerted in query cache
# Perform one query which should be inserted in query cache
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
......@@ -33,7 +61,7 @@ select * from t1;
show status like "Qcache_hits";
# Update the table and make sure the correct data is returned
update t1 set a=3 where pk=1;
update t1 set a1=3 where pk=1;
select * from t1;
show status like "Qcache_inserts";
show status like "Qcache_hits";
......@@ -48,18 +76,18 @@ select * from t1 order by pk desc;
show status like "Qcache_hits";
# Perform a "new" query and make sure the query cache is not hit
select * from t1 where b=3;
select * from t1 where b1=3;
show status like "Qcache_queries_in_cache";
show status like "Qcache_hits";
# Same query again...
select * from t1 where b=3;
select * from t1 where b1=3;
show status like "Qcache_hits";
# Delete from the table
delete from t1 where c='Fourth row';
delete from t1 where c1='Fourth row';
show status like "Qcache_queries_in_cache";
select * from t1 where b=3;
select * from t1 where b1=3;
show status like "Qcache_hits";
# Start another connection and check that the query cache is hit
......@@ -67,11 +95,11 @@ connect (con1,localhost,root,,);
connection con1;
use test;
select * from t1 order by pk desc;
select * from t1 where b=3;
select * from t1 where b1=3;
show status like "Qcache_hits";
# Update the table and switch to other connection
update t1 set a=4 where b=3;
update t1 set a1=4 where b1=3;
connect (con2,localhost,root,,);
connection con2;
use test;
......@@ -87,37 +115,243 @@ show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
# Use transactions and make sure the query cache is not updated until
# transaction is commited
# Load all tables into cache
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
#####################################################################
# Start transaction and perform update
# Switch to other transaction and check that update does not show up
# Switch back and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
connection con1;
flush status;
begin;
update t1 set a1=5 where pk=1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
commit;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
#####################################################################
# Start transaction and perform update
# Switch to other transaction and check that update does not show up
# Switch back, perform selects and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
connection con1;
flush status;
begin;
update t1 set a1=6 where pk=1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
# The two queries below will not hit cache since transaction is ongoing
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
commit;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
#####################################################################
# Start transaction and perform insert
# Switch to other transaction and check that insert does not show up
# Switch back, perform selects and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
connection con1;
flush status;
begin;
insert into t1 set pk=5, a1=6, b1=3, c1="New row";
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 where pk=5;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
# The below four queries will not be cached, trans is ongoing
select * from t1 where pk=5;
select * from t1 where pk=5;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
commit;
connection con2;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
#####################################################################
# Start transaction and perform delete
# Switch to other transaction and check that delete does not show up
# Switch back, perform selects and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
connection con1;
flush status;
begin;
update t1 set a=5 where pk=1;
delete from t1 where pk=2;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 where pk=2;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
# The below four queries will not be cached, trans is ongoing
select * from t1 where pk=2;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
select * from t1 where pk=2;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
commit;
# Sleep to let the query cache thread update commit count
sleep 10;
connection con2;
select * from t1 order by pk desc;
select * from t1 where pk=2;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
#####################################################################
# Start a transaction which updates all tables
# Switch to other transaction and check updates does not show up
# Switch back, perform selects and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
flush status;
begin;
update t1 set a1=9 where pk=1;
update t2 set a2=9 where pk=1;
update t3 set a3=9 where pk=1;
update t4 set a4=9 where a4=2;
update t5 set a5=9 where pk=1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
# The below five queries will not be cached, trans is ongoing
select * from t1 order by pk desc;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
commit;
connection con2;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
drop table t1;
drop table t1, t2, t3, t4, t5;
# There should be no queries in cache, when tables have been dropped
show status like "Qcache_queries_in_cache";
SET GLOBAL query_cache_size=0;
......
sql/ha_ndbcluster.cc
View file @ 5329b3a6
......@@ -286,7 +286,8 @@ Thd_ndb::~Thd_ndb()
{
if (ndb)
delete ndb;
ndb= 0;
ndb= NULL;
changed_tables.empty();
}
inline
......@@ -2003,6 +2004,8 @@ int ha_ndbcluster::write_row(byte *record)
}
}
m_rows_changed++;
/*
Execute write operation
NOTE When doing inserts with many values in
......@@ -2196,6 +2199,8 @@ int ha_ndbcluster::update_row(const byte *old_data, byte *new_data)
}
}
m_rows_changed++;
// Set non-key attribute(s)
for (i= 0; i < table->s->fields; i++)
{
......@@ -2279,6 +2284,8 @@ int ha_ndbcluster::delete_row(const byte *record)
}
}
m_rows_changed++;
// Execute delete operation
if (execute_no_commit(this,trans) != 0) {
no_uncommitted_rows_execute_failure();
......@@ -3181,14 +3188,14 @@ int ha_ndbcluster::external_lock(THD *thd, int lock_type)
Check that this handler instance has a connection
set up to the Ndb object of thd
*/
if (check_ndb_connection())
if (check_ndb_connection(thd))
DBUG_RETURN(1);
Thd_ndb *thd_ndb= get_thd_ndb(thd);
Ndb *ndb= thd_ndb->ndb;
DBUG_PRINT("enter", ("transaction.thd_ndb->lock_count: %d",
thd_ndb->lock_count));
DBUG_PRINT("enter", ("thd: %x, thd_ndb: %x, thd_ndb->lock_count: %d",
thd, thd_ndb, thd_ndb->lock_count));
if (lock_type != F_UNLCK)
{
......@@ -3196,7 +3203,6 @@ int ha_ndbcluster::external_lock(THD *thd, int lock_type)
if (!thd_ndb->lock_count++)
{
PRINT_OPTION_FLAGS(thd);
if (!(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN | OPTION_TABLE_LOCK)))
{
// Autocommit transaction
......@@ -3264,6 +3270,7 @@ int ha_ndbcluster::external_lock(THD *thd, int lock_type)
m_active_trans= thd_ndb->all ? thd_ndb->all : thd_ndb->stmt;
DBUG_ASSERT(m_active_trans);
// Start of transaction
m_rows_changed= 0;
m_retrieve_all_fields= FALSE;
m_retrieve_primary_key= FALSE;
m_ops_pending= 0;
......@@ -3282,6 +3289,24 @@ int ha_ndbcluster::external_lock(THD *thd, int lock_type)
else
{
DBUG_PRINT("info", ("lock_type == F_UNLCK"));
if (ndb_cache_check_time && m_rows_changed)
{
DBUG_PRINT("info", ("Rows has changed and util thread is running"));
if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN))
{
DBUG_PRINT("info", ("Add share to list of tables to be invalidated"));
/* NOTE push_back allocates memory using transactions mem_root! */
thd_ndb->changed_tables.push_back(m_share, &thd->transaction.mem_root);
}
pthread_mutex_lock(&m_share->mutex);
DBUG_PRINT("info", ("Invalidating commit_count"));
m_share->commit_count= 0;
m_share->commit_count_lock++;
pthread_mutex_unlock(&m_share->mutex);
}
if (!--thd_ndb->lock_count)
{
DBUG_PRINT("trans", ("Last external_lock"));
......@@ -3301,6 +3326,7 @@ int ha_ndbcluster::external_lock(THD *thd, int lock_type)
}
m_table= NULL;
m_table_info= NULL;
/*
This is the place to make sure this handler instance
no longer are connected to the active transaction.
......@@ -3406,6 +3432,19 @@ int ndbcluster_commit(THD *thd, bool all)
else
thd_ndb->stmt= NULL;
/* Clear commit_count for tables changed by transaction */
NDB_SHARE* share;
List_iterator_fast<NDB_SHARE> it(thd_ndb->changed_tables);
while ((share= it++))
{
pthread_mutex_lock(&share->mutex);
DBUG_PRINT("info", ("Invalidate commit_count for %s, share->commit_count: %d ", share->table_name, share->commit_count));
share->commit_count= 0;
share->commit_count_lock++;
pthread_mutex_unlock(&share->mutex);
}
thd_ndb->changed_tables.empty();
DBUG_RETURN(res);
}
......@@ -3443,6 +3482,9 @@ int ndbcluster_rollback(THD *thd, bool all)
else
thd_ndb->stmt= NULL;
/* Clear list of tables changed by transaction */
thd_ndb->changed_tables.empty();
DBUG_RETURN(res);
}
......@@ -4135,6 +4177,7 @@ ha_ndbcluster::ha_ndbcluster(TABLE *table_arg):
m_rows_to_insert(1),
m_rows_inserted(0),
m_bulk_insert_rows(1024),
m_rows_changed(0),
m_bulk_insert_not_flushed(FALSE),
m_ops_pending(0),
m_skip_auto_increment(TRUE),
......@@ -4309,9 +4352,8 @@ Ndb* check_ndb_in_thd(THD* thd)
int ha_ndbcluster::check_ndb_connection()
int ha_ndbcluster::check_ndb_connection(THD* thd)
{
THD* thd= current_thd;
Ndb *ndb;
DBUG_ENTER("check_ndb_connection");
......@@ -4390,8 +4432,6 @@ int ndbcluster_discover(THD* thd, const char *db, const char *name,
int ndbcluster_table_exists(THD* thd, const char *db, const char *name)
{
uint len;
const void* data;
const NDBTAB* tab;
Ndb* ndb;
DBUG_ENTER("ndbcluster_table_exists");
......@@ -4929,38 +4969,65 @@ uint ndb_get_commitcount(THD *thd, char *dbname, char *tabname,
{
DBUG_ENTER("ndb_get_commitcount");
if (ndb_cache_check_time > 0)
{
/* Use cached commit_count from share */
char name[FN_REFLEN];
NDB_SHARE *share;
(void)strxnmov(name, FN_REFLEN,
"./",dbname,"/",tabname,NullS);
DBUG_PRINT("info", ("name: %s", name));
(void)strxnmov(name, FN_REFLEN, "./",dbname,"/",tabname,NullS);
DBUG_PRINT("enter", ("name: %s", name));
pthread_mutex_lock(&ndbcluster_mutex);
if (!(share=(NDB_SHARE*) hash_search(&ndbcluster_open_tables,
(byte*) name,
strlen(name))))
{
pthread_mutex_unlock(&ndbcluster_mutex);
DBUG_PRINT("info", ("Table %s not found in ndbcluster_open_tables",
name));
DBUG_RETURN(1);
}
*commit_count= share->commit_count;
DBUG_PRINT("info", ("commit_count: %d", *commit_count));
share->use_count++;
pthread_mutex_unlock(&ndbcluster_mutex);
pthread_mutex_lock(&share->mutex);
if (ndb_cache_check_time > 0)
{
if (share->commit_count != 0)
{
*commit_count= share->commit_count;
DBUG_PRINT("info", ("Getting commit_count: %llu from share",
share->commit_count));
pthread_mutex_unlock(&share->mutex);
free_share(share);
DBUG_RETURN(0);
}
/* Get commit_count from NDB */
}
DBUG_PRINT("info", ("Get commit_count from NDB"));
Ndb *ndb;
if (!(ndb= check_ndb_in_thd(thd)))
DBUG_RETURN(1);
ndb->setDatabaseName(dbname);
uint lock= share->commit_count_lock;
pthread_mutex_unlock(&share->mutex);
struct Ndb_statistics stat;
if (ndb_get_table_statistics(ndb, tabname, &stat))
{
free_share(share);
DBUG_RETURN(1);
}
pthread_mutex_lock(&share->mutex);
if(share->commit_count_lock == lock)
{
DBUG_PRINT("info", ("Setting commit_count to %llu", stat.commit_count));
share->commit_count= stat.commit_count;
*commit_count= stat.commit_count;
}
else
{
DBUG_PRINT("info", ("Discarding commit_count, comit_count_lock changed"));
*commit_count= 0;
}
pthread_mutex_unlock(&share->mutex);
free_share(share);
DBUG_RETURN(0);
}
......@@ -5007,27 +5074,37 @@ ndbcluster_cache_retrieval_allowed(THD *thd,
char *dbname= full_name;
char *tabname= dbname+strlen(dbname)+1;
DBUG_PRINT("enter",("dbname=%s, tabname=%s, autocommit=%d",
DBUG_PRINT("enter", ("dbname: %s, tabname: %s, is_autocommit: %d",
dbname, tabname, is_autocommit));
if (!is_autocommit)
{
DBUG_PRINT("exit", ("No, don't use cache in transaction"));
DBUG_RETURN(FALSE);
}
if (ndb_get_commitcount(thd, dbname, tabname, &commit_count))
{
*engine_data+= 1; /* invalidate */
*engine_data= 0; /* invalidate */
DBUG_PRINT("exit", ("No, could not retrieve commit_count"));
DBUG_RETURN(FALSE);
}
DBUG_PRINT("info", ("*engine_data=%llu, commit_count=%llu",
DBUG_PRINT("info", ("*engine_data: %llu, commit_count: %llu",
*engine_data, commit_count));
if (*engine_data != commit_count)
if (commit_count == 0)
{
*engine_data= 0; /* invalidate */
DBUG_PRINT("exit", ("No, local commit has been performed"));
DBUG_RETURN(FALSE);
}
else if (*engine_data != commit_count)
{
*engine_data= commit_count; /* invalidate */
DBUG_PRINT("exit",("Do not use cache, commit_count has changed"));
DBUG_PRINT("exit", ("No, commit_count has changed"));
DBUG_RETURN(FALSE);
}
DBUG_PRINT("exit",("OK to use cache, *engine_data=%llu",*engine_data));
DBUG_PRINT("exit", ("OK to use cache, engine_data: %llu", *engine_data));
DBUG_RETURN(TRUE);
}
......@@ -5063,22 +5140,27 @@ ha_ndbcluster::register_query_cache_table(THD *thd,
DBUG_ENTER("ha_ndbcluster::register_query_cache_table");
bool is_autocommit= !(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN));
DBUG_PRINT("enter",("dbname=%s, tabname=%s, is_autocommit=%d",
m_dbname,m_tabname,is_autocommit));
DBUG_PRINT("enter",("dbname: %s, tabname: %s, is_autocommit: %d",
m_dbname, m_tabname, is_autocommit));
if (!is_autocommit)
{
DBUG_PRINT("exit", ("Can't register table during transaction"))
DBUG_RETURN(FALSE);
}
Uint64 commit_count;
if (ndb_get_commitcount(thd, m_dbname, m_tabname, &commit_count))
{
*engine_data= 0;
DBUG_PRINT("error", ("Could not get commitcount"))
DBUG_PRINT("exit", ("Error, could not get commitcount"))
DBUG_RETURN(FALSE);
}
*engine_data= commit_count;
*engine_callback= ndbcluster_cache_retrieval_allowed;
DBUG_PRINT("exit",("*engine_data=%llu", *engine_data));
DBUG_RETURN(TRUE);
DBUG_PRINT("exit", ("commit_count: %llu", commit_count));
DBUG_RETURN(commit_count > 0);
}
......@@ -5121,14 +5203,21 @@ static NDB_SHARE* get_share(const char *table_name)
thr_lock_init(&share->lock);
pthread_mutex_init(&share->mutex,MY_MUTEX_INIT_FAST);
share->commit_count= 0;
share->commit_count_lock= 0;
}
else
{
DBUG_PRINT("error", ("Failed to alloc share"));
pthread_mutex_unlock(&ndbcluster_mutex);
return 0;
}
}
share->use_count++;
DBUG_PRINT("share",
("table_name: %s, length: %d, use_count: %d, commit_count: %d",
share->table_name, share->table_name_length, share->use_count,
share->commit_count));
share->use_count++;
pthread_mutex_unlock(&ndbcluster_mutex);
return share;
}
......@@ -5283,6 +5372,7 @@ ndb_get_table_statistics(Ndb* ndb, const char * table,
if (check == -1)
break;
Uint32 count= 0;
Uint64 sum_rows= 0;
Uint64 sum_commits= 0;
Uint64 sum_row_size= 0;
......@@ -5294,6 +5384,7 @@ ndb_get_table_statistics(Ndb* ndb, const char * table,
if (sum_row_size < size)
sum_row_size= size;
sum_mem+= mem;
count++;
}
if (check == -1)
......@@ -5308,8 +5399,11 @@ ndb_get_table_statistics(Ndb* ndb, const char * table,
ndbstat->row_size= sum_row_size;
ndbstat->fragment_memory= sum_mem;
DBUG_PRINT("exit", ("records: %u commits: %u row_size: %d mem: %d",
sum_rows, sum_commits, sum_row_size, sum_mem));
DBUG_PRINT("exit", ("records: %llu commits: %llu "
"row_size: %llu mem: %llu count: %u",
sum_rows, sum_commits, sum_row_size,
sum_mem, count));
DBUG_RETURN(0);
} while(0);
......@@ -5739,6 +5833,7 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,
arg __attribute__((unused)))
{
THD *thd; /* needs to be first for thread_stack */
Ndb* ndb;
int error= 0;
struct timespec abstime;
......@@ -5748,12 +5843,13 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,
thd= new THD; /* note that contructor of THD uses DBUG_ */
THD_CHECK_SENTRY(thd);
ndb= new Ndb(g_ndb_cluster_connection, "");
pthread_detach_this_thread();
ndb_util_thread= pthread_self();
thd->thread_stack= (char*)&thd; /* remember where our stack is */
if (thd->store_globals())
if (thd->store_globals() && (ndb->init() != -1))
{
thd->cleanup();
delete thd;
......@@ -5779,22 +5875,11 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,
if (ndb_cache_check_time == 0)
{
/* Wake up in 10 seconds to check if value has changed */
set_timespec(abstime, 10);
/* Wake up in 1 second to check if value has changed */
set_timespec(abstime, 1);
continue;
}
/* Set new time to wake up */
struct timeval tv;
gettimeofday(&tv,0);
abstime.tv_sec= tv.tv_sec + (ndb_cache_check_time / 1000);
abstime.tv_nsec= tv.tv_usec * 1000 + (ndb_cache_check_time % 1000);
if (abstime.tv_nsec >= 1000000000)
{
abstime.tv_sec += 1;
abstime.tv_nsec -= 1000000000;
}
/* Lock mutex and fill list with pointers to all open tables */
NDB_SHARE *share;
pthread_mutex_lock(&ndbcluster_mutex);
......@@ -5814,7 +5899,7 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,
/* Iterate through the open files list */
List_iterator_fast<NDB_SHARE> it(util_open_tables);
while (share= it++)
while ((share= it++))
{
/* Split tab- and dbname */
char buf[FN_REFLEN];
......@@ -5825,26 +5910,37 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,
buf[length-1]= 0;
db= buf+dirname_length(buf);
DBUG_PRINT("ndb_util_thread",
("Fetching commit count for: %s, db: %s, tab: %s",
share->table_name, db, tabname));
("Fetching commit count for: %s",
share->table_name));
/* Contact NDB to get commit count for table */
g_ndb->setDatabaseName(db);
struct Ndb_statistics stat;;
if(ndb_get_table_statistics(g_ndb, tabname, &stat) == 0)
ndb->setDatabaseName(db);
struct Ndb_statistics stat;
uint lock;
pthread_mutex_lock(&share->mutex);
lock= share->commit_count_lock;
pthread_mutex_unlock(&share->mutex);
if(ndb_get_table_statistics(ndb, tabname, &stat) == 0)
{
DBUG_PRINT("ndb_util_thread",
("Table: %s, rows: %llu, commit_count: %llu",
share->table_name, stat.row_count, stat.commit_count));
share->commit_count= stat.commit_count;
("Table: %s, commit_count: %llu, rows: %llu",
share->table_name, stat.commit_count, stat.row_count));
}
else
{
DBUG_PRINT("ndb_util_thread",
("Error: Could not get commit count for table %s",
share->table_name));
share->commit_count++; /* Invalidate */
stat.commit_count= 0;
}
pthread_mutex_lock(&share->mutex);
if (share->commit_count_lock == lock)
share->commit_count= stat.commit_count;
pthread_mutex_unlock(&share->mutex);
/* Decrease the use count and possibly free share */
free_share(share);
}
......@@ -5852,6 +5948,26 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,
/* Clear the list of open tables */
util_open_tables.empty();
/* Calculate new time to wake up */
int secs= 0;
int msecs= ndb_cache_check_time;
struct timeval tick_time;
gettimeofday(&tick_time, 0);
abstime.tv_sec= tick_time.tv_sec;
abstime.tv_nsec= tick_time.tv_usec * 1000;
if(msecs >= 1000){
secs= msecs / 1000;
msecs= msecs % 1000;
}
abstime.tv_sec+= secs;
abstime.tv_nsec+= msecs * 1000000;
if (abstime.tv_nsec >= 1000000000) {
abstime.tv_sec+= 1;
abstime.tv_nsec-= 1000000000;
}
}
thd->cleanup();
......
sql/ha_ndbcluster.h
View file @ 5329b3a6
......@@ -60,6 +60,7 @@ typedef struct st_ndbcluster_share {
pthread_mutex_t mutex;
char *table_name;
uint table_name_length,use_count;
uint commit_count_lock;
ulonglong commit_count;
} NDB_SHARE;
......@@ -77,6 +78,7 @@ class Thd_ndb {
NdbTransaction *all;
NdbTransaction *stmt;
int error;
List<NDB_SHARE> changed_tables;
};
class ha_ndbcluster: public handler
......@@ -226,7 +228,7 @@ class ha_ndbcluster: public handler
char *update_table_comment(const char * comment);
private:
int check_ndb_connection();
int check_ndb_connection(THD* thd= current_thd);
NdbTransaction *m_active_trans;
NdbScanOperation *m_active_cursor;
......@@ -250,6 +252,7 @@ class ha_ndbcluster: public handler
ha_rows m_rows_to_insert;
ha_rows m_rows_inserted;
ha_rows m_bulk_insert_rows;
ha_rows m_rows_changed;
bool m_bulk_insert_not_flushed;
ha_rows m_ops_pending;
bool m_skip_auto_increment;
......
sql/set_var.cc
View file @ 5329b3a6
......@@ -413,7 +413,8 @@ sys_var_thd_bool
sys_ndb_use_exact_count("ndb_use_exact_count", &SV::ndb_use_exact_count);
sys_var_thd_bool
sys_ndb_use_transactions("ndb_use_transactions", &SV::ndb_use_transactions);
sys_var_long_ptr sys_ndb_cache_check_time("ndb_cache_check_time", &ndb_cache_check_time);
sys_var_long_ptr
sys_ndb_cache_check_time("ndb_cache_check_time", &ndb_cache_check_time);
#endif
/* Time/date/datetime formats */
......@@ -686,10 +687,10 @@ sys_var *sys_variables[]=
#endif
#ifdef HAVE_NDBCLUSTER_DB
&sys_ndb_autoincrement_prefetch_sz,
&sys_ndb_cache_check_time,
&sys_ndb_force_send,
&sys_ndb_use_exact_count,
&sys_ndb_use_transactions,
&sys_ndb_cache_check_time,
#endif
&sys_unique_checks,
&sys_updatable_views_with_limit,
......@@ -1276,7 +1277,6 @@ static int check_max_delayed_threads(THD *thd, set_var *var)
return 0;
}
static void fix_max_connections(THD *thd, enum_var_type type)
{
#ifndef EMBEDDED_LIBRARY
......
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