Updated InnoDB defaults

1) Buffer Pool size now defaults to 1GB and a minimum of 64MB
2) Log files are 3 by default and each 128MB in size
3) Removed innodb-file-io-threads config variable since no longer used
4) Set read io and write io threads to 8 by default for better default performance
5) Set log buffer size to 16 MB by default and minimum to 2MB
6) Set additional memory buffer pool to 8 MB and minimum to 2MB
7) Set max dirty percent to 75% and decreased to 99% to never allow a completely dirty buffer pool
8) Increased io capacity to 200 for a good default

storage/innobase/handler/ha_innodb.cc

@@ -98,7 +98,7 @@ static const long AUTOINC_NO_LOCKING = 2;
 
 static long innobase_mirrored_log_groups, innobase_log_files_in_group,
 	innobase_log_buffer_size, innobase_buffer_pool_awe_mem_mb,
-	innobase_additional_mem_pool_size, innobase_file_io_threads,
+	innobase_additional_mem_pool_size,
 	innobase_lock_wait_timeout, innobase_force_recovery,
 	innobase_open_files, innobase_autoinc_lock_mode;
 
@@ -1635,7 +1635,6 @@ innobase_init(
 
 	srv_mem_pool_size = (ulint) innobase_additional_mem_pool_size;
 
-	srv_n_file_io_threads = (ulint) innobase_file_io_threads;
         srv_n_read_io_threads = (ulint) innobase_read_io_threads;
         srv_n_write_io_threads = (ulint) innobase_write_io_threads;
         srv_max_merged_io = (ulint) innobase_max_merged_io;
@@ -8077,7 +8076,7 @@ static MYSQL_SYSVAR_BOOL(extra_dirty_writes, innobase_extra_dirty_writes,
 static MYSQL_SYSVAR_LONG(io_capacity, innobase_io_capacity,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "Number of IOPs the server can do. Tunes the background IO rate",
-  NULL, NULL, 100, 100, ~0L, 0);
+  NULL, NULL, 200, 100, ~0L, 0);
 
 static MYSQL_SYSVAR_ULONG(fast_shutdown, innobase_fast_shutdown,
   PLUGIN_VAR_OPCMDARG,
@@ -8129,7 +8128,7 @@ static MYSQL_SYSVAR_STR(log_group_home_dir, innobase_log_group_home_dir,
 static MYSQL_SYSVAR_ULONG(max_dirty_pages_pct, srv_max_buf_pool_modified_pct,
   PLUGIN_VAR_RQCMDARG,
   "Percentage of dirty pages allowed in bufferpool.",
-  NULL, NULL, 90, 0, 100, 0);
+  NULL, NULL, 75, 0, 99, 0);
 
 static MYSQL_SYSVAR_ULONG(max_purge_lag, srv_max_purge_lag,
   PLUGIN_VAR_RQCMDARG,
@@ -8160,17 +8159,17 @@ static MYSQL_SYSVAR_BOOL(adaptive_hash_index, innobase_adaptive_hash_index,
 static MYSQL_SYSVAR_LONG(additional_mem_pool_size, innobase_additional_mem_pool_size,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "Size of a memory pool InnoDB uses to store data dictionary information and other internal data structures.",
-  NULL, NULL, 1*1024*1024L, 512*1024L, ~0L, 1024);
+  NULL, NULL, 8*1024*1024L, 2*1024*1024L, ~0L, 1024);
 
 static MYSQL_SYSVAR_ULONG(autoextend_increment, srv_auto_extend_increment,
   PLUGIN_VAR_RQCMDARG,
   "Data file autoextend increment in megabytes",
-  NULL, NULL, 8L, 1L, 1000L, 0);
+  NULL, NULL, 64L, 1L, 1000L, 0);
 
 static MYSQL_SYSVAR_LONGLONG(buffer_pool_size, innobase_buffer_pool_size,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "The size of the memory buffer InnoDB uses to cache data and indexes of its tables.",
-  NULL, NULL, 8*1024*1024L, 1024*1024L, LONGLONG_MAX, 1024*1024L);
+  NULL, NULL, 1024*1024*1024L, 64*1024*1024L, LONGLONG_MAX, 1024*1024L);
 
 static MYSQL_SYSVAR_ULONG(commit_concurrency, srv_commit_concurrency,
   PLUGIN_VAR_RQCMDARG,
@@ -8182,20 +8181,15 @@ static MYSQL_SYSVAR_ULONG(concurrency_tickets, srv_n_free_tickets_to_enter,
   "Number of times a thread is allowed to enter InnoDB within the same SQL query after it has once got the ticket",
   NULL, NULL, 500L, 1L, ~0L, 0);
 
-static MYSQL_SYSVAR_LONG(file_io_threads, innobase_file_io_threads,
-  PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
-  "Number of file I/O threads in InnoDB.",
-  NULL, NULL, 4, 4, 64, 0);
-
 static MYSQL_SYSVAR_LONG(write_io_threads, innobase_write_io_threads,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "Number of write I/O threads in InnoDB.",
-  NULL, NULL, 1, 1, 64, 0);
+  NULL, NULL, 8, 1, 64, 0);
 
 static MYSQL_SYSVAR_LONG(read_io_threads, innobase_read_io_threads,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "Number of read I/O threads in InnoDB.",
-  NULL, NULL, 1, 1, 64, 0);
+  NULL, NULL, 8, 1, 64, 0);
 
 static MYSQL_SYSVAR_LONG(max_merged_io, innobase_max_merged_io,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
@@ -8215,17 +8209,17 @@ static MYSQL_SYSVAR_LONG(lock_wait_timeout, innobase_lock_wait_timeout,
 static MYSQL_SYSVAR_LONG(log_buffer_size, innobase_log_buffer_size,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "The size of the buffer which InnoDB uses to write log to the log files on disk.",
-  NULL, NULL, 1024*1024L, 256*1024L, ~0L, 1024);
+  NULL, NULL, 16*1024*1024L, 2*1024*1024L, ~0L, 1024);
 
 static MYSQL_SYSVAR_LONGLONG(log_file_size, innobase_log_file_size,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "Size of each log file in a log group.",
-  NULL, NULL, 5*1024*1024L, 1*1024*1024L, LONGLONG_MAX, 1024*1024L);
+  NULL, NULL, 128*1024*1024L, 32*1024*1024L, LONGLONG_MAX, 1024*1024L);
 
 static MYSQL_SYSVAR_LONG(log_files_in_group, innobase_log_files_in_group,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "Number of log files in the log group. InnoDB writes to the files in a circular fashion. Value 3 is recommended here.",
-  NULL, NULL, 2, 2, 100, 0);
+  NULL, NULL, 3, 2, 100, 0);
 
 static MYSQL_SYSVAR_LONG(mirrored_log_groups, innobase_mirrored_log_groups,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
@@ -8286,7 +8280,6 @@ static struct st_mysql_sys_var* innobase_system_variables[]= {
   MYSQL_SYSVAR(data_home_dir),
   MYSQL_SYSVAR(doublewrite),
   MYSQL_SYSVAR(fast_shutdown),
-  MYSQL_SYSVAR(file_io_threads),
   MYSQL_SYSVAR(read_io_threads),
   MYSQL_SYSVAR(write_io_threads),
   MYSQL_SYSVAR(max_merged_io),

storage/innobase/include/srv0srv.h

@@ -91,7 +91,6 @@ extern ulint	srv_lock_table_size;
 
 extern ibool    srv_thread_concurrency_timer_based;
 
-extern ulint	srv_n_file_io_threads;
 /* Number of background IO threads for read and write. Replaces
  * srv_n_file_io_threads. */
 extern ulint	srv_n_read_io_threads;

storage/innobase/srv/srv0srv.c

@@ -178,8 +178,6 @@ ulint   srv_io_capacity         = ULINT_MAX;    /* Number of IO operations per
 ibool   srv_extra_dirty_writes = TRUE;  /* Write dirty pages to disk when pct
                                            dirty < max dirty pct */
 
-ulint	srv_n_file_io_threads	= ULINT_MAX;
-
 ulint	srv_n_read_io_threads	= ULINT_MAX;
 ulint	srv_n_write_io_threads	= ULINT_MAX;
 ulint	srv_max_merged_io = 64;