add general recommendation for innodb log file changes
add information to INTERNALS.md about innodb log file to buffer pool ratio fix buffer pool typos in comments fix code formatting a bit
This commit is contained in:
Peter 'Pessoft' Kolínek
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2 changed files with 33 additions and 29 deletions
30
INTERNALS.md
30
INTERNALS.md
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@ -72,7 +72,7 @@
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## MySQLTuner system checks
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* 32-bit w/>2GB RAM check
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* Check number of opened ports (warning if more than 9 ports opened)
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* Check 80, 8080, 443 and 8443 ports if warning are raised if there are opened
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* Check 80, 8080, 443 and 8443 ports if warning are raised if there are opened
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* Check if some banned ports are not opened (option --bannedports separated by comma)
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* Check if non kernel and user process except mysqld are not using more than 15% of total physical memory)
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* Check vm.swapiness
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@ -103,7 +103,7 @@
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* Users w/o host restriction
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* Weak password check (possibly using cracklib later?)
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* Using basic_passwords.txt as password database
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* Password list checks can be avoid (option: --skippassword)
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* Password list checks can be avoid (option: --skippassword)
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## MySQLTuner CVE vulnerabilities detection
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@ -131,7 +131,7 @@
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* Per index information
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* Index Cardinality
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* Index Selectivity
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* Misc information about index definition
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* Misc information about index definition
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* Misc information about index size
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## MySQLTuner Connections information
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@ -180,7 +180,7 @@
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* Query Cache DISABLED, ALL REQUEST or ON DEMAND
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* Query Cache Size
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* Query cache hit ratio (cache efficienty)
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## MySQLTuner memory checks
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* Get total RAM/swap
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@ -209,8 +209,10 @@
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* MySQL needs 1 instanes per 1Go of Buffer Pool
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* innodb_buffer_pool instances = round(innodb_buffer_pool_size / 1Go)
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* innodb_buffer_pool instances must be equals or lower than 64
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* InnoDB Buffer Pool Usage
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* InnoDB Buffer Pool Usage
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* If more than 20% of InnoDB buffer pool is not used, MySQLTuner raise an alert.
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* InnoDB Buffer Pool Log Size
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* InnoDB total log file size should be 25% of innodb_buffer_pool_size
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* InnoDB Read effiency
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* Ratio of read without locks
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* InnoDB Write effiency
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@ -225,7 +227,7 @@
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* Is Aria indexes size is greater than page cache size ?
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* Page cache read hit ratio (>95%)
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* Page cache write hit ratio (>95%)
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## MySQLTuner MYISAM information
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@ -264,13 +266,13 @@
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## MySQLTuner TokuDB information
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* tokudb_cache_size
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* tokudb_directio
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* tokudb_cache_size
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* tokudb_directio
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* tokudb_empty_scan
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* tokudb_read_block_size
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* tokudb_commit_sync
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* tokudb_checkpointing_period
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* tokudb_block_size
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* tokudb_block_size
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* tokudb_cleaner_iterations
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* tokudb_fanout
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@ -289,7 +291,7 @@
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## MySQLTuner RocksDb information
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* Nothing for the moment
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## MySQLTuner Thread pool information
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* thread_pool_size between 16 to 36 for Innodb usage
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@ -352,9 +354,9 @@
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* Event per wait total latency
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* Event per wait read latency
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* Event per wait write latency
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* TOP 15 most read indexes
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* TOP 15 most read indexes
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* TOP 15 most modified indexes
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* TOP 15 high select latency index
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* TOP 15 high select latency index
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* TOP 15 high insert latency index
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* TOP 15 high update latency index
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* TOP 15 high delete latency index
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@ -383,7 +385,7 @@
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* TOP 15 merge queries with sort
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* TOP 15 average sort merges queries with sort
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* TOP 15 scans queries with sort
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* TOP 15 range queries with sort
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* TOP 15 range queries with sort
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* Top 20 queries with temp table
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* Last 50 queries with temp table
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* TOP 15 total latency queries with temp table
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@ -393,4 +395,4 @@
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* TOP 15 class events by total latency
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* TOP 30 events by total latency
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* TOP 15 class events by max latency
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* TOP 30 events by max latency
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* TOP 30 events by max latency
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@ -2645,7 +2645,7 @@ sub mysql_stats {
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if ( defined $myvar{'query_cache_type'} ) {
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infoprint "Query Cache Buffers";
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infoprint " +-- Query Cache: "
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infoprint " +-- Query Cache: "
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. $myvar{'query_cache_type'} . " - "
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. (
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$myvar{'query_cache_type'} eq 0 |
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@ -5382,7 +5382,7 @@ sub mysql_innodb {
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. $myvar{'innodb_thread_concurrency'};
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}
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# InnoDB Buffer Pull Size
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# InnoDB Buffer Pool Size
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if ( $myvar{'innodb_file_per_table'} eq "ON" ) {
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goodprint "InnoDB File per table is activated";
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}
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@ -5391,7 +5391,7 @@ sub mysql_innodb {
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push( @adjvars, "innodb_file_per_table=ON" );
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}
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# InnoDB Buffer Pull Size
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# InnoDB Buffer Pool Size
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if ( $myvar{'innodb_buffer_pool_size'} > $enginestats{'InnoDB'} ) {
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goodprint "InnoDB buffer pool / data size: "
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. hr_bytes( $myvar{'innodb_buffer_pool_size'} ) . "/"
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@ -5416,12 +5416,15 @@ sub mysql_innodb {
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. hr_bytes( $myvar{'innodb_buffer_pool_size'} )
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. " should be equal 25%";
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push( @adjvars,
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"innodb_log_file_size should be (="
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. hr_bytes_rnd(
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$myvar{'innodb_buffer_pool_size'} /
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$myvar{'innodb_log_files_in_group'} / 4
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)
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. ") if possible, so InnoDB total log files size equals to 25% of buffer pool size."
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"innodb_log_file_size should be (="
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. hr_bytes_rnd(
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$myvar{'innodb_buffer_pool_size'} /
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$myvar{'innodb_log_files_in_group'} / 4
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)
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. ") if possible, so InnoDB total log files size equals to 25% of buffer pool size."
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);
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push( @generalrec,
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"Read this before changing innodb_log_file_size and/or innodb_log_files_in_group: http://bit.ly/2wgkDvS"
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);
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}
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else {
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@ -5432,7 +5435,7 @@ sub mysql_innodb {
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. " should be equal 25%";
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}
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# InnoDB Buffer Pull Instances (MySQL 5.6.6+)
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# InnoDB Buffer Pool Instances (MySQL 5.6.6+)
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if ( defined( $myvar{'innodb_buffer_pool_instances'} ) ) {
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# Bad Value if > 64
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@ -5442,12 +5445,12 @@ sub mysql_innodb {
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push( @adjvars, "innodb_buffer_pool_instances (<= 64)" );
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}
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# InnoDB Buffer Pull Size > 1Go
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# InnoDB Buffer Pool Size > 1Go
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if ( $myvar{'innodb_buffer_pool_size'} > 1024 * 1024 * 1024 ) {
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# InnoDB Buffer Pull Size / 1Go = InnoDB Buffer Pull Instances limited to 64 max.
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# InnoDB Buffer Pool Size / 1Go = InnoDB Buffer Pool Instances limited to 64 max.
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# InnoDB Buffer Pull Size > 64Go
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# InnoDB Buffer Pool Size > 64Go
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my $max_innodb_buffer_pool_instances =
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int( $myvar{'innodb_buffer_pool_size'} / ( 1024 * 1024 * 1024 ) );
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$max_innodb_buffer_pool_instances = 64
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@ -5468,7 +5471,7 @@ sub mysql_innodb {
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. $myvar{'innodb_buffer_pool_instances'} . "";
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}
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# InnoDB Buffer Pull Size < 1Go
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# InnoDB Buffer Pool Size < 1Go
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}
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else {
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if ( $myvar{'innodb_buffer_pool_instances'} != 1 ) {
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@ -6381,4 +6384,3 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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# cperl-indent-level: 8
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# perl-indent-level: 8
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# End:
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