@uref{http://www.mysql.com/Downloads/Linux/linuxthreads-2.2-patch,linuxthreads-2.2-patch} to correct this behaviour. Please note that since there are so
many versions of glibc floating around, the patch may not apply cleanly to
or RAID_TYPE= @{1 | STRIPED | RAID0 @} RAID_CHUNKS=# RAID_CHUNKSIZE=#
or UNION = (table_name,[table_name...])
...
...
@@ -21464,6 +21499,20 @@ The buffer that is allocated when sorting the index when doing a
@code{REPAIR} or when creating indexes with @code{CREATE INDEX} or
@code{ALTER TABLE}.
@item @code{myisam_max_extra_sort_file_size}.
If the creating of the temporary file for fast index creation would be
this much bigger than using the key cache, then prefer the key cache
method. This is mainly used to force long character keys in large
tables to use the slower key cache method to create the index.
@strong{NOTE} that this parameter is given in megabytes!
@item @code{myisam_max_sort_file_size}
The maximum size of the temporary file @strong{MySQL} is allowed to create
to while recreating the index (during @code{REPAIR}, @code{ALTER TABLE}
or @code{LOAD DATA INFILE}. If the file size would be bigger than this,
the index will be created through the key cache (which is slower).
@strong{NOTE} that this parameter is given in megabytes!
@item @code{net_buffer_length}
The communication buffer is reset to this size between queries. This
should not normally be changed, but if you have very little memory, you
...
...
@@ -23066,13 +23115,16 @@ system resources than @code{ISAM}, but will need more CPU when inserting
data into a compressed index.
The following options to @code{mysqld} can be used to change the behavior of
@code{MyISAM} tables:
@code{MyISAM} tables. @xref{SHOW VARIABLES}.
@multitable @columnfractions .40 .60
@item @strong{Option} @tab @strong{Meaning}
@item @code{--myisam-recover=#} @tab Automatic recover of crashed tables.
@item @code{-O myisam_sort_buffer_size=#} @tab Buffer used when recovering tables.
@item @code{--delay-key-write-for-all-tables} @tab Don't flush key buffers between writes for any MyISAM table
@item @code{-O myisam_max_extra_sort_file_size=#} @tab Used to help @strong{MySQL} to decide when to use the slow but safe key cache index create method. @strong{NOTE} that this parameter is given in megabytes!
@item @code{-O myisam_max_sort_file_size=#} @tab Don't use the fast sort index method to created index if the temporary file would get bigger than this.
@strong{NOTE} that this paramter is given in megabytes!
@end multitable
The automatic recovery is activated if you start mysqld with
...
...
@@ -23994,15 +24046,15 @@ the configuration file. Below is an example of possible configuration
@@ -28063,6 +28115,9 @@ If you compile with @code{--with-debug=full}, then you will loose 20 %
for most queries, but some queries may take substantially longer (The
@strong{MySQL} benchmarks ran 35 % slower)
If you use @code{--with-debug}, then you will only loose 15 %.
By starting a @code{mysqld} version compiled with @code{--with-debug=full}
with @code{--skip-safemalloc} the end result should be close to when
configuring with @code{--with-debug}.
@item
On a Sun SPARCstation 20, SunPro C++ 4.2 is 5 % faster than @code{gcc} 2.95.2.
...
...
@@ -30846,9 +30901,9 @@ The @code{mysqladmin status} command result has the following columns:
@cindex open tables
@item Open tables @tab Number of tables that are open now.
@cindex memory use
@item Memory in use @tab Memory allocated directly by the mysqld code (only available when @strong{MySQL} is compiled with --with-debug).
@item Memory in use @tab Memory allocated directly by the mysqld code (only available when @strong{MySQL} is compiled with --with-debug=full).
@cindex max memory used
@item Max memory used @tab Maximum memory allocated directly by the mysqld code (only available when @strong{MySQL} is compiled with --with-debug).
@item Max memory used @tab Maximum memory allocated directly by the mysqld code (only available when @strong{MySQL} is compiled with --with-debug=full).
@end multitable
If you do @code{myslqadmin shutdown} on a socket (in other words, on a
...
...
@@ -34103,7 +34158,7 @@ this problem.
@itemize @bullet
@item
You can use the static @strong{MySQL} libraries for Borland C++ that you
can find on @uref{http://www.mysql.net/downloads/os-win32.html}.
can find on @uref{http://www.mysql.com/downloads/os-win32.html}.
@item
Only call @code{mysql_init()} with @code{NULL} as an argument, not a
pre-allocated MYSQL struct.
...
...
@@ -34335,8 +34390,9 @@ Try @code{fork_test.pl} and @code{fork2_test.pl}.
@item
If you configure @strong{MySQL} for debugging, it will be much easier to
gather information about possible errors if something goes wrong.
Reconfigure @strong{MySQL} with the @code{--with-debug} option to
@code{configure} and then recompile. @xref{Debugging server}.
Reconfigure @strong{MySQL} with the @code{--with-debug} option or
@code{--with-debug=full} to @code{configure} and then recompile.
@xref{Debugging server}.
@item
Configuring @strong{MySQL} for debugging causes a safe memory allocator to be
...
...
@@ -42508,7 +42564,23 @@ not yet 100% confident in this code.
Fixed bug in @code{ALTER TABLE} and @code{LOAD DATA INFILE} that disabled
key-sorting. These command should now be faster in most cases.
@item
Initialize signals early to avoid a problem with signals in Innobase.
Fixed performance bug where reopened tables (tables that had been
waiting for @code{FLUSH} or @code{REPAIR}) would not use indexes for the
next query.
@item
Fixed problem with @code{ALTER TABLE} to Innobase tables on Freebsd.
@item
Added @code{mysqld} variables @code{myisam_max_sort_file_size} and
@code{myisam_max_extra_sort_file_size}.
@item
Initialize signals early to avoid problem with signals in Innobase.
@item
Applied patch for the @code{tis620} character set to make comparisons
case-independent and to fix a bug in @code{LIKE} for this character set.
@strong{NOTE}: All tables that uses the @code{tis620} character set must be
fixed with @code{myisamchk -r} or @code{REPAIR TABLE} !
@item
Added @code{--skip-safemalloc} option to @code{mysqld}.
$sth=$dbh->Query("select max(id) from $firsttable")||die"Got error select max: $Mysql::db_errstr\n";
if((@row=$sth->FetchRow())&&defined($row[0]))
{
$max_id=$id=$row[0];
}
else
{
$id=0;
}
}
else
{
$id=$tmpvar%$max_id;
}
$sth=$dbh->Query("select value from $firsttable,$secondtable where $firsttable.id=$id and $secondtable.id=$firsttable.id")||die"Got error on select form $secondtable: $Mysql::db_errstr\n";
