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#146: Correct write effiency calculation based on log writes

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root 2016-02-24 20:20:48 +01:00
parent 09383daee8
commit 6dae07a921
1 changed files with 27 additions and 20 deletions
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47
mysqltuner.pl
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@ -377,6 +377,7 @@ sub os_setup {
# Checks for updates to MySQLTuner
sub validate_tuner_version {
if ($opt{checkversion} eq 0) {
print "\n";
infoprint "Skipped version check for MySQLTuner script";
return;
}
@ -1651,6 +1652,8 @@ sub calculations {
( $myvar{'innodb_log_file_size'} * 100 /
$myvar{'innodb_buffer_pool_size'} );
}
# InnoDB Buffer pool read cache effiency
(
$mystat{'Innodb_buffer_pool_read_requests'},
$mystat{'Innodb_buffer_pool_reads'}
@ -1669,24 +1672,28 @@ sub calculations {
. $mystat{'Innodb_buffer_pool_reads'} . "";
debugprint "Innodb_buffer_pool_read_requests: "
. $mystat{'Innodb_buffer_pool_read_requests'} . "";
# InnoDB log write cache effiency
(
$mystat{'Innodb_buffer_pool_write_requests'},
$mystat{'Innodb_buffer_pool_writes'}
$mystat{'Innodb_log_write_requests'},
$mystat{'Innodb_log_writes'}
)
= ( 1, 1 )
unless defined $mystat{'Innodb_buffer_pool_writes'};
unless defined $mystat{'Innodb_log_writes'};
$mycalc{'pct_write_efficiency'} = percentage(
(
$mystat{'Innodb_buffer_pool_write_requests'} -
$mystat{'Innodb_buffer_pool_writes'}
$mystat{'Innodb_log_write_requests'} -
$mystat{'Innodb_log_writes'}
),
$mystat{'Innodb_buffer_pool_write_requests'}
) if defined $mystat{'Innodb_buffer_pool_write_requests'};
debugprint "pct_write_efficiency: " . $mycalc{'pct_read_efficiency'} . "";
debugprint "Innodb_buffer_pool_writes: "
. $mystat{'Innodb_buffer_pool_writes'} . "";
debugprint "Innodb_buffer_pool_write_requests: "
. $mystat{'Innodb_buffer_pool_write_requests'} . "";
$mystat{'Innodb_log_write_requests'}
) if defined $mystat{'Innodb_log_write_requests'};
debugprint "pct_write_efficiency: " . $mycalc{'pct_write_efficiency'} . "";
debugprint "Innodb_log_writes: "
. $mystat{'Innodb_log_writes'} . "";
debugprint "Innodb_log_write_requests: "
. $mystat{'Innodb_log_write_requests'} . "";
$mycalc{'pct_innodb_buffer_used'} = percentage(
(
$mystat{'Innodb_buffer_pool_pages_total'} -
@ -2600,21 +2607,21 @@ sub mysql_innodb {
if ( defined $mycalc{'pct_write_efficiency'}
&& $mycalc{'pct_write_efficiency'} < 90 )
{
badprint "InnoDB Write buffer efficiency: "
badprint "InnoDB Write Log efficiency: "
. $mycalc{'pct_write_efficiency'} . "% ("
. ( $mystat{'Innodb_buffer_pool_write_requests'} -
$mystat{'Innodb_buffer_pool_writes'} )
. ( $mystat{'Innodb_log_write_requests'} -
$mystat{'Innodb_log_writes'} )
. " hits/ "
. $mystat{'Innodb_buffer_pool_write_requests'}
. $mystat{'Innodb_log_write_requests'}
. " total)";
}
else {
goodprint "InnoDB Write buffer efficiency: "
goodprint "InnoDB Write log efficiency: "
. $mycalc{'pct_write_efficiency'} . "% ("
. ( $mystat{'Innodb_buffer_pool_write_requests'} -
$mystat{'Innodb_buffer_pool_writes'} )
. ( $mystat{'Innodb_log_write_requests'} -
$mystat{'Innodb_log_writes'} )
. " hits/ "
. $mystat{'Innodb_buffer_pool_write_requests'}
. $mystat{'Innodb_log_write_requests'}
. " total)";
}