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Sep 11, 2017
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Add recommendation for innodb log file changes and some extra information #343

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30 changes: 16 additions & 14 deletions INTERNALS.md
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Original file line number Diff line number Diff line change
Expand Up @@ -72,7 +72,7 @@
## MySQLTuner system checks
* 32-bit w/>2GB RAM check
* Check number of opened ports (warning if more than 9 ports opened)
* Check 80, 8080, 443 and 8443 ports if warning are raised if there are opened
* Check 80, 8080, 443 and 8443 ports if warning are raised if there are opened
* Check if some banned ports are not opened (option --bannedports separated by comma)
* Check if non kernel and user process except mysqld are not using more than 15% of total physical memory)
* Check vm.swapiness
Expand Down Expand Up @@ -103,7 +103,7 @@
* Users w/o host restriction
* Weak password check (possibly using cracklib later?)
* Using basic_passwords.txt as password database
* Password list checks can be avoid (option: --skippassword)
* Password list checks can be avoid (option: --skippassword)

## MySQLTuner CVE vulnerabilities detection

Expand Down Expand Up @@ -131,7 +131,7 @@
* Per index information
* Index Cardinality
* Index Selectivity
* Misc information about index definition
* Misc information about index definition
* Misc information about index size

## MySQLTuner Connections information
Expand Down Expand Up @@ -180,7 +180,7 @@
* Query Cache DISABLED, ALL REQUEST or ON DEMAND
* Query Cache Size
* Query cache hit ratio (cache efficienty)

## MySQLTuner memory checks

* Get total RAM/swap
Expand Down Expand Up @@ -209,8 +209,10 @@
* MySQL needs 1 instanes per 1Go of Buffer Pool
* innodb_buffer_pool instances = round(innodb_buffer_pool_size / 1Go)
* innodb_buffer_pool instances must be equals or lower than 64
* InnoDB Buffer Pool Usage
* InnoDB Buffer Pool Usage
* If more than 20% of InnoDB buffer pool is not used, MySQLTuner raise an alert.
* InnoDB Buffer Pool Log Size
* InnoDB total log file size should be 25% of innodb_buffer_pool_size
* InnoDB Read effiency
* Ratio of read without locks
* InnoDB Write effiency
Expand All @@ -225,7 +227,7 @@
* Is Aria indexes size is greater than page cache size ?
* Page cache read hit ratio (>95%)
* Page cache write hit ratio (>95%)


## MySQLTuner MYISAM information

Expand Down Expand Up @@ -264,13 +266,13 @@

## MySQLTuner TokuDB information

* tokudb_cache_size
* tokudb_directio
* tokudb_cache_size
* tokudb_directio
* tokudb_empty_scan
* tokudb_read_block_size
* tokudb_commit_sync
* tokudb_checkpointing_period
* tokudb_block_size
* tokudb_block_size
* tokudb_cleaner_iterations
* tokudb_fanout

Expand All @@ -289,7 +291,7 @@
## MySQLTuner RocksDb information

* Nothing for the moment

## MySQLTuner Thread pool information

* thread_pool_size between 16 to 36 for Innodb usage
Expand Down Expand Up @@ -352,9 +354,9 @@
* Event per wait total latency
* Event per wait read latency
* Event per wait write latency
* TOP 15 most read indexes
* TOP 15 most read indexes
* TOP 15 most modified indexes
* TOP 15 high select latency index
* TOP 15 high select latency index
* TOP 15 high insert latency index
* TOP 15 high update latency index
* TOP 15 high delete latency index
Expand Down Expand Up @@ -383,7 +385,7 @@
* TOP 15 merge queries with sort
* TOP 15 average sort merges queries with sort
* TOP 15 scans queries with sort
* TOP 15 range queries with sort
* TOP 15 range queries with sort
* Top 20 queries with temp table
* Last 50 queries with temp table
* TOP 15 total latency queries with temp table
Expand All @@ -393,4 +395,4 @@
* TOP 15 class events by total latency
* TOP 30 events by total latency
* TOP 15 class events by max latency
* TOP 30 events by max latency
* TOP 30 events by max latency
32 changes: 17 additions & 15 deletions mysqltuner.pl
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Original file line number Diff line number Diff line change
Expand Up @@ -2645,7 +2645,7 @@ sub mysql_stats {

if ( defined $myvar{'query_cache_type'} ) {
infoprint "Query Cache Buffers";
infoprint " +-- Query Cache: "
infoprint " +-- Query Cache: "
. $myvar{'query_cache_type'} . " - "
. (
$myvar{'query_cache_type'} eq 0 |
Expand Down Expand Up @@ -5382,7 +5382,7 @@ sub mysql_innodb {
. $myvar{'innodb_thread_concurrency'};
}

# InnoDB Buffer Pull Size
# InnoDB Buffer Pool Size
if ( $myvar{'innodb_file_per_table'} eq "ON" ) {
goodprint "InnoDB File per table is activated";
}
Expand All @@ -5391,7 +5391,7 @@ sub mysql_innodb {
push( @adjvars, "innodb_file_per_table=ON" );
}

# InnoDB Buffer Pull Size
# InnoDB Buffer Pool Size
if ( $myvar{'innodb_buffer_pool_size'} > $enginestats{'InnoDB'} ) {
goodprint "InnoDB buffer pool / data size: "
. hr_bytes( $myvar{'innodb_buffer_pool_size'} ) . "/"
Expand All @@ -5416,12 +5416,15 @@ sub mysql_innodb {
. hr_bytes( $myvar{'innodb_buffer_pool_size'} )
. " should be equal 25%";
push( @adjvars,
"innodb_log_file_size should be (="
. hr_bytes_rnd(
$myvar{'innodb_buffer_pool_size'} /
$myvar{'innodb_log_files_in_group'} / 4
)
. ") if possible, so InnoDB total log files size equals to 25% of buffer pool size."
"innodb_log_file_size should be (="
. hr_bytes_rnd(
$myvar{'innodb_buffer_pool_size'} /
$myvar{'innodb_log_files_in_group'} / 4
)
. ") if possible, so InnoDB total log files size equals to 25% of buffer pool size."
);
push( @generalrec,
"Read this before changing innodb_log_file_size and/or innodb_log_files_in_group: http://bit.ly/2wgkDvS"
);
}
else {
Expand All @@ -5432,7 +5435,7 @@ sub mysql_innodb {
. " should be equal 25%";
}

# InnoDB Buffer Pull Instances (MySQL 5.6.6+)
# InnoDB Buffer Pool Instances (MySQL 5.6.6+)
if ( defined( $myvar{'innodb_buffer_pool_instances'} ) ) {

# Bad Value if > 64
Expand All @@ -5442,12 +5445,12 @@ sub mysql_innodb {
push( @adjvars, "innodb_buffer_pool_instances (<= 64)" );
}

# InnoDB Buffer Pull Size > 1Go
# InnoDB Buffer Pool Size > 1Go
if ( $myvar{'innodb_buffer_pool_size'} > 1024 * 1024 * 1024 ) {

# InnoDB Buffer Pull Size / 1Go = InnoDB Buffer Pull Instances limited to 64 max.
# InnoDB Buffer Pool Size / 1Go = InnoDB Buffer Pool Instances limited to 64 max.

# InnoDB Buffer Pull Size > 64Go
# InnoDB Buffer Pool Size > 64Go
my $max_innodb_buffer_pool_instances =
int( $myvar{'innodb_buffer_pool_size'} / ( 1024 * 1024 * 1024 ) );
$max_innodb_buffer_pool_instances = 64
Expand All @@ -5468,7 +5471,7 @@ sub mysql_innodb {
. $myvar{'innodb_buffer_pool_instances'} . "";
}

# InnoDB Buffer Pull Size < 1Go
# InnoDB Buffer Pool Size < 1Go
}
else {
if ( $myvar{'innodb_buffer_pool_instances'} != 1 ) {
Expand Down Expand Up @@ -6381,4 +6384,3 @@ =head1 COPYRIGHT AND LICENSE
# cperl-indent-level: 8
# perl-indent-level: 8
# End: