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Fixing important performance issue during collecting metrics

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Jean-Marie Renouard 2018-09-20 13:11:34 +00:00
parent e76f3a25b1
commit 08cb34587b
2 changed files with 16 additions and 0 deletions
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1
INTERNALS.md
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@ -111,6 +111,7 @@
* Check if your MariaDB or MySQL version contains CVE bulletins. * Check if your MariaDB or MySQL version contains CVE bulletins.
## MySQLTuner database information ## MySQLTuner database information
* Performance analysis parameter checks
* Per database information * Per database information
* Tables number * Tables number
* Rows number * Rows number

15
mysqltuner.pl
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@ -5706,6 +5706,19 @@ sub mysql_innodb {
$result{'Calculations'} = {%mycalc}; $result{'Calculations'} = {%mycalc};
} }
sub check_metadata_perf {
subheaderprint "Analysis Performance Metrics";
infoprint "innodb_stats_on_metadata: ".$myvar{'innodb_stats_on_metadata'};
if ($myvar{'innodb_stats_on_metadata'} == 'ON') {
badprint "Stat are updated during querying INFORMATION_SCHEMA.";
push @adjvars, "SET innodb_stats_on_metadata = OFF";
#Disabling innodb_stats_on_metadata
select_one("SET GLOBAL innodb_stats_on_metadata = OFF;");
return 1;
}
goodprint "No stat updates during querying INFORMATION_SCHEMA.";
return 0
}
# Recommendations for Database metrics # Recommendations for Database metrics
sub mysql_databases { sub mysql_databases {
return if ( $opt{dbstat} == 0 ); return if ( $opt{dbstat} == 0 );
@ -6210,6 +6223,8 @@ check_architecture; # Suggest 64-bit upgrade
system_recommendations; # avoid to many service on the same host system_recommendations; # avoid to many service on the same host
log_file_recommendations; # check log file content log_file_recommendations; # check log file content
check_storage_engines; # Show enabled storage engines check_storage_engines; # Show enabled storage engines
check_metadata_perf; # Show parameter impacting performance during analysis
mysql_databases; # Show informations about databases mysql_databases; # Show informations about databases
mysql_tables; # Show informations about table column mysql_tables; # Show informations about table column