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Adding some sysctl control in sysstat mode

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Christine 2016-04-04 12:12:09 +02:00
parent 42593c642c
commit 292cbfedad
1 changed files with 39 additions and 0 deletions
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39
mysqltuner.pl
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@ -1159,6 +1159,44 @@ sub infocmd_one {
return join ', ', @result; return join ', ', @result;
} }
sub get_kernel_info()
{
my @params=('fs.aio-max-nr', 'fs.aio-nr', 'fs.file-max', 'sunrpc.tcp_fin_timeout',
'sunrpc.tcp_max_slot_table_entries', 'sunrpc.tcp_slot_table_entries',
'vm.swappiness');
infoprint "Informations about kernel tuning:";
foreach my $param (@params) {
infocmd_tab("sysctl $param");
}
if (`sysctl -n vm.swappiness` > 10) {
badprint "Swappiness is > 10, please consider having a value lower than 10";
push @generalrec, "setup swappieness lower or equals to 10";
push @adjvars, 'vm.swappiness <= 10 (echo 0 > /proc/sys/vm/swappiness)';
} else {
infoprint "Swappiness is < 10.";
}
if (`sysctl -n sunrpc.tcp_slot_table_entries` < 100) {
badprint "Initial TCP slot entries is < 1M, please consider having a value greater than 100";
push @generalrec, "setup Initial TCP slot entries greater than 100";
push @adjvars, 'sunrpc.tcp_slot_table_entries > 100 (echo 128 > /proc/sys/sunrpc/tcp_slot_table_entries)';
} else {
infoprint "TCP slot entries is > 100.";
}
if (`sysctl -n fs.aio-max-nr` < 1000000) {
badprint "Max running total of the number of events is < 1M, please consider having a value greater than 1M";
push @generalrec, "setup Max running number events greater than 1M";
push @adjvars, 'fs.aio-max-nr > 1M (echo 1048576 > /proc/sys/fs/aio-max-nr)';
} else {
infoprint "Max Number of AIO events is > 1M.";
}
}
sub get_system_info() { sub get_system_info() {
infoprint get_os_release; infoprint get_os_release;
if (is_virtual_machine) { if (is_virtual_machine) {
@ -1272,6 +1310,7 @@ sub system_recommendations {
} }
get_fs_info; get_fs_info;
get_kernel_info;
} }
sub security_recommendations { sub security_recommendations {