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check_mysql_health.pl
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check_mysql_health.pl
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#! /usr/bin/perl -w
# Source:
# nagios: -epn
my %ERRORS=( OK => 0, WARNING => 1, CRITICAL => 2, UNKNOWN => 3 );
my %ERRORCODES=( 0 => 'OK', 1 => 'WARNING', 2 => 'CRITICAL', 3 => 'UNKNOWN' );
package DBD::MySQL::Server::Instance::Innodb;
use strict;
our @ISA = qw(DBD::MySQL::Server::Instance);
sub new {
my $class = shift;
my %params = @_;
my $self = {
handle => $params{handle},
internals => undef,
warningrange => $params{warningrange},
criticalrange => $params{criticalrange},
};
bless $self, $class;
$self->init(%params);
return $self;
}
sub init {
my $self = shift;
my %params = @_;
$self->init_nagios();
if ($params{mode} =~ /server::instance::innodb/) {
$self->{internals} =
DBD::MySQL::Server::Instance::Innodb::Internals->new(%params);
}
}
sub nagios {
my $self = shift;
my %params = @_;
if ($params{mode} =~ /server::instance::innodb/) {
$self->{internals}->nagios(%params);
$self->merge_nagios($self->{internals});
}
}
package DBD::MySQL::Server::Instance::Innodb::Internals;
use strict;
our @ISA = qw(DBD::MySQL::Server::Instance::Innodb);
our $internals; # singleton, nur ein einziges mal instantiierbar
sub new {
my $class = shift;
my %params = @_;
unless ($internals) {
$internals = {
handle => $params{handle},
bufferpool_hitrate => undef,
wait_free => undef,
log_waits => undef,
have_innodb => undef,
warningrange => $params{warningrange},
criticalrange => $params{criticalrange},
};
bless($internals, $class);
$internals->init(%params);
}
return($internals);
}
sub init {
my $self = shift;
my %params = @_;
my $dummy;
$self->debug("enter init");
$self->init_nagios();
if (DBD::MySQL::Server::return_first_server()->version_is_minimum("5.1")) {
($dummy, $self->{have_innodb}) = $self->{handle}->fetchrow_array(q{
SELECT ENGINE, SUPPORT FROM INFORMATION_SCHEMA.ENGINES WHERE ENGINE='InnoDB'
});
} else {
($dummy, $self->{have_innodb}) = $self->{handle}->fetchrow_array(q{
SHOW VARIABLES LIKE 'have_innodb'
});
}
if ($self->{have_innodb} eq "NO") {
$self->add_nagios_critical("the innodb engine has a problem (have_innodb=no)");
} elsif ($self->{have_innodb} eq "DISABLED") {
# add_nagios_ok later
} elsif ($params{mode} =~ /server::instance::innodb::bufferpool::hitrate/) {
($dummy, $self->{bufferpool_reads})
= $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Innodb_buffer_pool_reads'
});
($dummy, $self->{bufferpool_read_requests})
= $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Innodb_buffer_pool_read_requests'
});
if (! defined $self->{bufferpool_reads}) {
$self->add_nagios_critical("no innodb buffer pool info available");
} else {
$self->valdiff(\%params, qw(bufferpool_reads
bufferpool_read_requests));
$self->{bufferpool_hitrate_now} =
$self->{delta_bufferpool_read_requests} > 0 ?
100 - (100 * $self->{delta_bufferpool_reads} /
$self->{delta_bufferpool_read_requests}) : 100;
$self->{bufferpool_hitrate} =
$self->{bufferpool_read_requests} > 0 ?
100 - (100 * $self->{bufferpool_reads} /
$self->{bufferpool_read_requests}) : 100;
}
} elsif ($params{mode} =~ /server::instance::innodb::bufferpool::waitfree/) {
($dummy, $self->{bufferpool_wait_free})
= $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Innodb_buffer_pool_wait_free'
});
if (! defined $self->{bufferpool_wait_free}) {
$self->add_nagios_critical("no innodb buffer pool info available");
} else {
$self->valdiff(\%params, qw(bufferpool_wait_free));
$self->{bufferpool_wait_free_rate} =
$self->{delta_bufferpool_wait_free} / $self->{delta_timestamp};
}
} elsif ($params{mode} =~ /server::instance::innodb::logwaits/) {
($dummy, $self->{log_waits})
= $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Innodb_log_waits'
});
if (! defined $self->{log_waits}) {
$self->add_nagios_critical("no innodb log info available");
} else {
$self->valdiff(\%params, qw(log_waits));
$self->{log_waits_rate} =
$self->{delta_log_waits} / $self->{delta_timestamp};
}
} elsif ($params{mode} =~ /server::instance::innodb::needoptimize/) {
#fragmentation=$(($datafree * 100 / $datalength))
# http://www.electrictoolbox.com/optimize-tables-mysql-php/
my @result = $self->{handle}->fetchall_array(q{
SHOW TABLE STATUS WHERE Data_free / Data_length > 0.1 AND Data_free > 102400
});
printf "%s\n", Data::Dumper::Dumper(\@result);
}
}
sub nagios {
my $self = shift;
my %params = @_;
my $now = $params{lookback} ? '_now' : '';
if ($self->{have_innodb} eq "DISABLED") {
$self->add_nagios_ok("the innodb engine has been disabled");
} elsif (! $self->{nagios_level}) {
if ($params{mode} =~ /server::instance::innodb::bufferpool::hitrate/) {
my $refkey = 'bufferpool_hitrate'.($params{lookback} ? '_now' : '');
$self->add_nagios(
$self->check_thresholds($self->{$refkey}, "99:", "95:"),
sprintf "innodb buffer pool hitrate at %.2f%%", $self->{$refkey});
$self->add_perfdata(sprintf "bufferpool_hitrate=%.2f%%;%s;%s;0;100",
$self->{bufferpool_hitrate},
$self->{warningrange}, $self->{criticalrange});
$self->add_perfdata(sprintf "bufferpool_hitrate_now=%.2f%%",
$self->{bufferpool_hitrate_now});
} elsif ($params{mode} =~ /server::instance::innodb::bufferpool::waitfree/) {
$self->add_nagios(
$self->check_thresholds($self->{bufferpool_wait_free_rate}, "1", "10"),
sprintf "%ld innodb buffer pool waits in %ld seconds (%.4f/sec)",
$self->{delta_bufferpool_wait_free}, $self->{delta_timestamp},
$self->{bufferpool_wait_free_rate});
$self->add_perfdata(sprintf "bufferpool_free_waits_rate=%.4f;%s;%s;0;100",
$self->{bufferpool_wait_free_rate},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::innodb::logwaits/) {
$self->add_nagios(
$self->check_thresholds($self->{log_waits_rate}, "1", "10"),
sprintf "%ld innodb log waits in %ld seconds (%.4f/sec)",
$self->{delta_log_waits}, $self->{delta_timestamp},
$self->{log_waits_rate});
$self->add_perfdata(sprintf "innodb_log_waits_rate=%.4f;%s;%s;0;100",
$self->{log_waits_rate},
$self->{warningrange}, $self->{criticalrange});
}
}
}
package DBD::MySQL::Server::Instance::MyISAM;
use strict;
our @ISA = qw(DBD::MySQL::Server::Instance);
sub new {
my $class = shift;
my %params = @_;
my $self = {
handle => $params{handle},
internals => undef,
warningrange => $params{warningrange},
criticalrange => $params{criticalrange},
};
bless $self, $class;
$self->init(%params);
return $self;
}
sub init {
my $self = shift;
my %params = @_;
$self->init_nagios();
if ($params{mode} =~ /server::instance::myisam/) {
$self->{internals} =
DBD::MySQL::Server::Instance::MyISAM::Internals->new(%params);
}
}
sub nagios {
my $self = shift;
my %params = @_;
if ($params{mode} =~ /server::instance::myisam/) {
$self->{internals}->nagios(%params);
$self->merge_nagios($self->{internals});
}
}
package DBD::MySQL::Server::Instance::MyISAM::Internals;
use strict;
our @ISA = qw(DBD::MySQL::Server::Instance::MyISAM);
our $internals; # singleton, nur ein einziges mal instantiierbar
sub new {
my $class = shift;
my %params = @_;
unless ($internals) {
$internals = {
handle => $params{handle},
keycache_hitrate => undef,
warningrange => $params{warningrange},
criticalrange => $params{criticalrange},
};
bless($internals, $class);
$internals->init(%params);
}
return($internals);
}
sub init {
my $self = shift;
my %params = @_;
my $dummy;
$self->debug("enter init");
$self->init_nagios();
if ($params{mode} =~ /server::instance::myisam::keycache::hitrate/) {
($dummy, $self->{key_reads})
= $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Key_reads'
});
($dummy, $self->{key_read_requests})
= $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Key_read_requests'
});
if (! defined $self->{key_read_requests}) {
$self->add_nagios_critical("no myisam keycache info available");
} else {
$self->valdiff(\%params, qw(key_reads key_read_requests));
$self->{keycache_hitrate} =
$self->{key_read_requests} > 0 ?
100 - (100 * $self->{key_reads} /
$self->{key_read_requests}) : 100;
$self->{keycache_hitrate_now} =
$self->{delta_key_read_requests} > 0 ?
100 - (100 * $self->{delta_key_reads} /
$self->{delta_key_read_requests}) : 100;
}
} elsif ($params{mode} =~ /server::instance::myisam::sonstnochwas/) {
}
}
sub nagios {
my $self = shift;
my %params = @_;
if (! $self->{nagios_level}) {
if ($params{mode} =~ /server::instance::myisam::keycache::hitrate/) {
my $refkey = 'keycache_hitrate'.($params{lookback} ? '_now' : '');
$self->add_nagios(
$self->check_thresholds($self->{$refkey}, "99:", "95:"),
sprintf "myisam keycache hitrate at %.2f%%", $self->{$refkey});
$self->add_perfdata(sprintf "keycache_hitrate=%.2f%%;%s;%s",
$self->{keycache_hitrate},
$self->{warningrange}, $self->{criticalrange});
$self->add_perfdata(sprintf "keycache_hitrate_now=%.2f%%;%s;%s",
$self->{keycache_hitrate_now},
$self->{warningrange}, $self->{criticalrange});
}
}
}
package DBD::MySQL::Server::Instance::Replication;
use strict;
our @ISA = qw(DBD::MySQL::Server::Instance);
sub new {
my $class = shift;
my %params = @_;
my $self = {
handle => $params{handle},
internals => undef,
warningrange => $params{warningrange},
criticalrange => $params{criticalrange},
};
bless $self, $class;
$self->init(%params);
return $self;
}
sub init {
my $self = shift;
my %params = @_;
$self->init_nagios();
if ($params{mode} =~ /server::instance::replication/) {
$self->{internals} =
DBD::MySQL::Server::Instance::Replication::Internals->new(%params);
}
}
sub nagios {
my $self = shift;
my %params = @_;
if ($params{mode} =~ /server::instance::replication/) {
$self->{internals}->nagios(%params);
$self->merge_nagios($self->{internals});
}
}
package DBD::MySQL::Server::Instance::Replication::Internals;
use strict;
our @ISA = qw(DBD::MySQL::Server::Instance::Replication);
our $internals; # singleton, nur ein einziges mal instantiierbar
sub new {
my $class = shift;
my %params = @_;
unless ($internals) {
$internals = {
handle => $params{handle},
seconds_behind_master => undef,
slave_io_running => undef,
slave_sql_running => undef,
warningrange => $params{warningrange},
criticalrange => $params{criticalrange},
};
bless($internals, $class);
$internals->init(%params);
}
return($internals);
}
sub init {
my $self = shift;
my %params = @_;
$self->debug("enter init");
$self->init_nagios();
if ($params{mode} =~ /server::instance::replication::slavelag/) {
# "show slave status", "Seconds_Behind_Master"
my $slavehash = $self->{handle}->selectrow_hashref(q{
SHOW SLAVE STATUS
});
if ((! defined $slavehash->{Seconds_Behind_Master}) &&
(lc $slavehash->{Slave_IO_Running} eq 'no')) {
$self->add_nagios_critical(
"unable to get slave lag, because io thread is not running");
} elsif (! defined $slavehash->{Seconds_Behind_Master}) {
$self->add_nagios_critical(sprintf "unable to get replication info%s",
$self->{handle}->{errstr} ? $self->{handle}->{errstr} : "");
} else {
$self->{seconds_behind_master} = $slavehash->{Seconds_Behind_Master};
}
} elsif ($params{mode} =~ /server::instance::replication::slaveiorunning/) {
# "show slave status", "Slave_IO_Running"
my $slavehash = $self->{handle}->selectrow_hashref(q{
SHOW SLAVE STATUS
});
if (! defined $slavehash->{Slave_IO_Running}) {
$self->add_nagios_critical(sprintf "unable to get replication info%s",
$self->{handle}->{errstr} ? $self->{handle}->{errstr} : "");
} else {
$self->{slave_io_running} = $slavehash->{Slave_IO_Running};
}
} elsif ($params{mode} =~ /server::instance::replication::slavesqlrunning/) {
# "show slave status", "Slave_SQL_Running"
my $slavehash = $self->{handle}->selectrow_hashref(q{
SHOW SLAVE STATUS
});
if (! defined $slavehash->{Slave_SQL_Running}) {
$self->add_nagios_critical(sprintf "unable to get replication info%s",
$self->{handle}->{errstr} ? $self->{handle}->{errstr} : "");
} else {
$self->{slave_sql_running} = $slavehash->{Slave_SQL_Running};
}
}
}
sub nagios {
my $self = shift;
my %params = @_;
if (! $self->{nagios_level}) {
if ($params{mode} =~ /server::instance::replication::slavelag/) {
$self->add_nagios(
$self->check_thresholds($self->{seconds_behind_master}, "10", "20"),
sprintf "Slave is %d seconds behind master",
$self->{seconds_behind_master});
$self->add_perfdata(sprintf "slave_lag=%d;%s;%s",
$self->{seconds_behind_master},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::replication::slaveiorunning/) {
if (lc $self->{slave_io_running} eq "yes") {
$self->add_nagios_ok("Slave io is running");
} else {
$self->add_nagios_critical("Slave io is not running");
}
} elsif ($params{mode} =~ /server::instance::replication::slavesqlrunning/) {
if (lc $self->{slave_sql_running} eq "yes") {
$self->add_nagios_ok("Slave sql is running");
} else {
$self->add_nagios_critical("Slave sql is not running");
}
}
}
}
package DBD::MySQL::Server::Instance;
use strict;
our @ISA = qw(DBD::MySQL::Server);
sub new {
my $class = shift;
my %params = @_;
my $self = {
handle => $params{handle},
uptime => $params{uptime},
replication_user => $params{replication_user},
warningrange => $params{warningrange},
criticalrange => $params{criticalrange},
threads_connected => undef,
threads_created => undef,
connections => undef,
threadcache_hitrate => undef,
querycache_hitrate => undef,
lowmem_prunes_per_sec => undef,
slow_queries_per_sec => undef,
longrunners => undef,
tablecache_hitrate => undef,
index_usage => undef,
engine_innodb => undef,
engine_myisam => undef,
replication => undef,
};
bless $self, $class;
$self->init(%params);
return $self;
}
sub init {
my $self = shift;
my %params = @_;
my $dummy;
$self->init_nagios();
if ($params{mode} =~ /server::instance::connectedthreads/) {
($dummy, $self->{threads_connected}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Threads_connected'
});
} elsif ($params{mode} =~ /server::instance::createdthreads/) {
($dummy, $self->{threads_created}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Threads_created'
});
$self->valdiff(\%params, qw(threads_created));
$self->{threads_created_per_sec} = $self->{delta_threads_created} /
$self->{delta_timestamp};
} elsif ($params{mode} =~ /server::instance::runningthreads/) {
($dummy, $self->{threads_running}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Threads_running'
});
} elsif ($params{mode} =~ /server::instance::cachedthreads/) {
($dummy, $self->{threads_cached}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Threads_cached'
});
} elsif ($params{mode} =~ /server::instance::abortedconnects/) {
($dummy, $self->{connects_aborted}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Aborted_connects'
});
$self->valdiff(\%params, qw(connects_aborted));
$self->{connects_aborted_per_sec} = $self->{delta_connects_aborted} /
$self->{delta_timestamp};
} elsif ($params{mode} =~ /server::instance::abortedclients/) {
($dummy, $self->{clients_aborted}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Aborted_clients'
});
$self->valdiff(\%params, qw(clients_aborted));
$self->{clients_aborted_per_sec} = $self->{delta_clients_aborted} /
$self->{delta_timestamp};
} elsif ($params{mode} =~ /server::instance::threadcachehitrate/) {
($dummy, $self->{threads_created}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Threads_created'
});
($dummy, $self->{connections}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Connections'
});
$self->valdiff(\%params, qw(threads_created connections));
if ($self->{delta_connections} > 0) {
$self->{threadcache_hitrate_now} =
100 - ($self->{delta_threads_created} * 100.0 /
$self->{delta_connections});
} else {
$self->{threadcache_hitrate_now} = 100;
}
$self->{threadcache_hitrate} = 100 -
($self->{threads_created} * 100.0 / $self->{connections});
$self->{connections_per_sec} = $self->{delta_connections} /
$self->{delta_timestamp};
} elsif ($params{mode} =~ /server::instance::querycachehitrate/) {
($dummy, $self->{qcache_inserts}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Qcache_inserts'
});
($dummy, $self->{qcache_not_cached}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Qcache_not_cached'
});
($dummy, $self->{com_select}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Com_select'
});
($dummy, $self->{qcache_hits}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Qcache_hits'
});
# SHOW VARIABLES WHERE Variable_name = 'have_query_cache' for 5.x, but LIKE is compatible
($dummy, $self->{have_query_cache}) = $self->{handle}->fetchrow_array(q{
SHOW VARIABLES LIKE 'have_query_cache'
});
# SHOW VARIABLES WHERE Variable_name = 'query_cache_size'
($dummy, $self->{query_cache_size}) = $self->{handle}->fetchrow_array(q{
SHOW VARIABLES LIKE 'query_cache_size'
});
$self->valdiff(\%params, qw(com_select qcache_hits));
$self->{querycache_hitrate_now} =
($self->{delta_com_select} + $self->{delta_qcache_hits}) > 0 ?
100 * $self->{delta_qcache_hits} /
($self->{delta_com_select} + $self->{delta_qcache_hits}) :
0;
$self->{querycache_hitrate} =
($self->{qcache_not_cached} + $self->{qcache_inserts} + $self->{qcache_hits}) > 0 ?
100 * $self->{qcache_hits} /
($self->{qcache_not_cached} + $self->{qcache_inserts} + $self->{qcache_hits}) :
0;
$self->{selects_per_sec} =
$self->{delta_com_select} / $self->{delta_timestamp};
} elsif ($params{mode} =~ /server::instance::querycachelowmemprunes/) {
($dummy, $self->{lowmem_prunes}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Qcache_lowmem_prunes'
});
$self->valdiff(\%params, qw(lowmem_prunes));
$self->{lowmem_prunes_per_sec} = $self->{delta_lowmem_prunes} /
$self->{delta_timestamp};
} elsif ($params{mode} =~ /server::instance::slowqueries/) {
($dummy, $self->{slow_queries}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Slow_queries'
});
$self->valdiff(\%params, qw(slow_queries));
$self->{slow_queries_per_sec} = $self->{delta_slow_queries} /
$self->{delta_timestamp};
} elsif ($params{mode} =~ /server::instance::longprocs/) {
if (DBD::MySQL::Server::return_first_server()->version_is_minimum("5.1")) {
($self->{longrunners}) = $self->{handle}->fetchrow_array(qq(
SELECT
COUNT(*)
FROM
information_schema.processlist
WHERE user <> ?
AND id <> CONNECTION_ID()
AND time > 60
AND command <> 'Sleep'
), $self->{replication_user});
} else {
$self->{longrunners} = 0 if ! defined $self->{longrunners};
foreach ($self->{handle}->fetchall_array(q{
SHOW PROCESSLIST
})) {
my($id, $user, $host, $db, $command, $tme, $state, $info) = @{$_};
if (($user ne $self->{replication_user}) &&
($tme > 60) &&
($command ne 'Sleep')) {
$self->{longrunners}++;
}
}
}
} elsif ($params{mode} =~ /server::instance::tablecachehitrate/) {
($dummy, $self->{open_tables}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Open_tables'
});
($dummy, $self->{opened_tables}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Opened_tables'
});
if (DBD::MySQL::Server::return_first_server()->version_is_minimum("5.1.3")) {
# SHOW VARIABLES WHERE Variable_name = 'table_open_cache'
($dummy, $self->{table_cache}) = $self->{handle}->fetchrow_array(q{
SHOW VARIABLES LIKE 'table_open_cache'
});
} else {
# SHOW VARIABLES WHERE Variable_name = 'table_cache'
($dummy, $self->{table_cache}) = $self->{handle}->fetchrow_array(q{
SHOW VARIABLES LIKE 'table_cache'
});
}
$self->{table_cache} ||= 0;
#$self->valdiff(\%params, qw(open_tables opened_tables table_cache));
# _now ist hier sinnlos, da opened_tables waechst, aber open_tables wieder
# schrumpfen kann weil tabellen geschlossen werden.
if ($self->{opened_tables} != 0 && $self->{table_cache} != 0) {
$self->{tablecache_hitrate} =
100 * $self->{open_tables} / $self->{opened_tables};
$self->{tablecache_fillrate} =
100 * $self->{open_tables} / $self->{table_cache};
} elsif ($self->{opened_tables} == 0 && $self->{table_cache} != 0) {
$self->{tablecache_hitrate} = 100;
$self->{tablecache_fillrate} =
100 * $self->{open_tables} / $self->{table_cache};
} else {
$self->{tablecache_hitrate} = 0;
$self->{tablecache_fillrate} = 0;
$self->add_nagios_critical("no table cache");
}
} elsif ($params{mode} =~ /server::instance::tablelockcontention/) {
($dummy, $self->{table_locks_waited}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Table_locks_waited'
});
($dummy, $self->{table_locks_immediate}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Table_locks_immediate'
});
$self->valdiff(\%params, qw(table_locks_waited table_locks_immediate));
$self->{table_lock_contention} =
($self->{table_locks_waited} + $self->{table_locks_immediate}) > 0 ?
100 * $self->{table_locks_waited} /
($self->{table_locks_waited} + $self->{table_locks_immediate}) :
100;
$self->{table_lock_contention_now} =
($self->{delta_table_locks_waited} + $self->{delta_table_locks_immediate}) > 0 ?
100 * $self->{delta_table_locks_waited} /
($self->{delta_table_locks_waited} + $self->{delta_table_locks_immediate}) :
100;
} elsif ($params{mode} =~ /server::instance::tableindexusage/) {
# http://johnjacobm.wordpress.com/2007/06/
# formula for calculating the percentage of full table scans
($dummy, $self->{handler_read_first}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Handler_read_first'
});
($dummy, $self->{handler_read_key}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Handler_read_key'
});
($dummy, $self->{handler_read_next}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Handler_read_next'
});
($dummy, $self->{handler_read_prev}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Handler_read_prev'
});
($dummy, $self->{handler_read_rnd}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Handler_read_rnd'
});
($dummy, $self->{handler_read_rnd_next}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Handler_read_rnd_next'
});
$self->valdiff(\%params, qw(handler_read_first handler_read_key
handler_read_next handler_read_prev handler_read_rnd
handler_read_rnd_next));
my $delta_reads = $self->{delta_handler_read_first} +
$self->{delta_handler_read_key} +
$self->{delta_handler_read_next} +
$self->{delta_handler_read_prev} +
$self->{delta_handler_read_rnd} +
$self->{delta_handler_read_rnd_next};
my $reads = $self->{handler_read_first} +
$self->{handler_read_key} +
$self->{handler_read_next} +
$self->{handler_read_prev} +
$self->{handler_read_rnd} +
$self->{handler_read_rnd_next};
$self->{index_usage_now} = ($delta_reads == 0) ? 0 :
100 - (100.0 * ($self->{delta_handler_read_rnd} +
$self->{delta_handler_read_rnd_next}) /
$delta_reads);
$self->{index_usage} = ($reads == 0) ? 0 :
100 - (100.0 * ($self->{handler_read_rnd} +
$self->{handler_read_rnd_next}) /
$reads);
} elsif ($params{mode} =~ /server::instance::tabletmpondisk/) {
($dummy, $self->{created_tmp_tables}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Created_tmp_tables'
});
($dummy, $self->{created_tmp_disk_tables}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Created_tmp_disk_tables'
});
$self->valdiff(\%params, qw(created_tmp_tables created_tmp_disk_tables));
$self->{pct_tmp_on_disk} = $self->{created_tmp_tables} > 0 ?
100 * $self->{created_tmp_disk_tables} / $self->{created_tmp_tables} :
100;
$self->{pct_tmp_on_disk_now} = $self->{delta_created_tmp_tables} > 0 ?
100 * $self->{delta_created_tmp_disk_tables} / $self->{delta_created_tmp_tables} :
100;
} elsif ($params{mode} =~ /server::instance::openfiles/) {
($dummy, $self->{open_files_limit}) = $self->{handle}->fetchrow_array(q{
SHOW VARIABLES LIKE 'open_files_limit'
});
($dummy, $self->{open_files}) = $self->{handle}->fetchrow_array(q{
SHOW /*!50000 global */ STATUS LIKE 'Open_files'
});
$self->{pct_open_files} = 100 * $self->{open_files} / $self->{open_files_limit};
} elsif ($params{mode} =~ /server::instance::needoptimize/) {
$self->{fragmented} = [];
#http://www.electrictoolbox.com/optimize-tables-mysql-php/
my @result = $self->{handle}->fetchall_array(q{
SHOW TABLE STATUS
});
foreach (@result) {
my ($name, $engine, $data_length, $data_free) =
($_->[0], $_->[1], $_->[6 ], $_->[9]);
next if ($params{name} && $params{name} ne $name);
my $fragmentation = $data_length ? $data_free * 100 / $data_length : 0;
push(@{$self->{fragmented}},
[$name, $fragmentation, $data_length, $data_free]);
}
} elsif ($params{mode} =~ /server::instance::myisam/) {
$self->{engine_myisam} = DBD::MySQL::Server::Instance::MyISAM->new(
%params
);
} elsif ($params{mode} =~ /server::instance::innodb/) {
$self->{engine_innodb} = DBD::MySQL::Server::Instance::Innodb->new(
%params
);
} elsif ($params{mode} =~ /server::instance::replication/) {
$self->{replication} = DBD::MySQL::Server::Instance::Replication->new(
%params
);
}
}
sub nagios {
my $self = shift;
my %params = @_;
if (! $self->{nagios_level}) {
if ($params{mode} =~ /server::instance::connectedthreads/) {
$self->add_nagios(
$self->check_thresholds($self->{threads_connected}, 10, 20),
sprintf "%d client connection threads", $self->{threads_connected});
$self->add_perfdata(sprintf "threads_connected=%d;%d;%d",
$self->{threads_connected},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::createdthreads/) {
$self->add_nagios(
$self->check_thresholds($self->{threads_created_per_sec}, 10, 20),
sprintf "%.2f threads created/sec", $self->{threads_created_per_sec});
$self->add_perfdata(sprintf "threads_created_per_sec=%.2f;%.2f;%.2f",
$self->{threads_created_per_sec},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::runningthreads/) {
$self->add_nagios(
$self->check_thresholds($self->{threads_running}, 10, 20),
sprintf "%d running threads", $self->{threads_running});
$self->add_perfdata(sprintf "threads_running=%d;%d;%d",
$self->{threads_running},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::cachedthreads/) {
$self->add_nagios(
$self->check_thresholds($self->{threads_cached}, 10, 20),
sprintf "%d cached threads", $self->{threads_cached});
$self->add_perfdata(sprintf "threads_cached=%d;%d;%d",
$self->{threads_cached},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::abortedconnects/) {
$self->add_nagios(
$self->check_thresholds($self->{connects_aborted_per_sec}, 1, 5),
sprintf "%.2f aborted connections/sec", $self->{connects_aborted_per_sec});
$self->add_perfdata(sprintf "connects_aborted_per_sec=%.2f;%.2f;%.2f",
$self->{connects_aborted_per_sec},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::abortedclients/) {
$self->add_nagios(
$self->check_thresholds($self->{clients_aborted_per_sec}, 1, 5),
sprintf "%.2f aborted (client died) connections/sec", $self->{clients_aborted_per_sec});
$self->add_perfdata(sprintf "clients_aborted_per_sec=%.2f;%.2f;%.2f",
$self->{clients_aborted_per_sec},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::threadcachehitrate/) {
my $refkey = 'threadcache_hitrate'.($params{lookback} ? '_now' : '');
$self->add_nagios(
$self->check_thresholds($self->{$refkey}, "90:", "80:"),
sprintf "thread cache hitrate %.2f%%", $self->{$refkey});
$self->add_perfdata(sprintf "thread_cache_hitrate=%.2f%%;%s;%s",
$self->{threadcache_hitrate},
$self->{warningrange}, $self->{criticalrange});
$self->add_perfdata(sprintf "thread_cache_hitrate_now=%.2f%%",
$self->{threadcache_hitrate_now});
$self->add_perfdata(sprintf "connections_per_sec=%.2f",
$self->{connections_per_sec});
} elsif ($params{mode} =~ /server::instance::querycachehitrate/) {
my $refkey = 'querycache_hitrate'.($params{lookback} ? '_now' : '');
if ((lc $self->{have_query_cache} eq 'yes') && ($self->{query_cache_size})) {
$self->add_nagios(
$self->check_thresholds($self->{$refkey}, "90:", "80:"),
sprintf "query cache hitrate %.2f%%", $self->{$refkey});
} else {
$self->check_thresholds($self->{$refkey}, "90:", "80:");
$self->add_nagios_ok(
sprintf "query cache hitrate %.2f%% (because it's turned off)",
$self->{querycache_hitrate});
}
$self->add_perfdata(sprintf "qcache_hitrate=%.2f%%;%s;%s",
$self->{querycache_hitrate},
$self->{warningrange}, $self->{criticalrange});
$self->add_perfdata(sprintf "qcache_hitrate_now=%.2f%%",
$self->{querycache_hitrate_now});
$self->add_perfdata(sprintf "selects_per_sec=%.2f",
$self->{selects_per_sec});
} elsif ($params{mode} =~ /server::instance::querycachelowmemprunes/) {
$self->add_nagios(
$self->check_thresholds($self->{lowmem_prunes_per_sec}, "1", "10"),
sprintf "%d query cache lowmem prunes in %d seconds (%.2f/sec)",
$self->{delta_lowmem_prunes}, $self->{delta_timestamp},
$self->{lowmem_prunes_per_sec});
$self->add_perfdata(sprintf "qcache_lowmem_prunes_rate=%.2f;%s;%s",
$self->{lowmem_prunes_per_sec},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::slowqueries/) {
$self->add_nagios(
$self->check_thresholds($self->{slow_queries_per_sec}, "0.1", "1"),
sprintf "%d slow queries in %d seconds (%.2f/sec)",
$self->{delta_slow_queries}, $self->{delta_timestamp},
$self->{slow_queries_per_sec});
$self->add_perfdata(sprintf "slow_queries_rate=%.2f%%;%s;%s",
$self->{slow_queries_per_sec},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::longprocs/) {
$self->add_nagios(
$self->check_thresholds($self->{longrunners}, 10, 20),
sprintf "%d long running processes", $self->{longrunners});
$self->add_perfdata(sprintf "long_running_procs=%d;%d;%d",
$self->{longrunners},
$self->{warningrange}, $self->{criticalrange});
} elsif ($params{mode} =~ /server::instance::tablecachehitrate/) {
if ($self->{tablecache_fillrate} < 95) {
$self->add_nagios_ok(
sprintf "table cache hitrate %.2f%%, %.2f%% filled",
$self->{tablecache_hitrate},
$self->{tablecache_fillrate});
$self->check_thresholds($self->{tablecache_hitrate}, "99:", "95:");
} else {
$self->add_nagios(
$self->check_thresholds($self->{tablecache_hitrate}, "99:", "95:"),
sprintf "table cache hitrate %.2f%%", $self->{tablecache_hitrate});
}
$self->add_perfdata(sprintf "tablecache_hitrate=%.2f%%;%s;%s",
$self->{tablecache_hitrate},
$self->{warningrange}, $self->{criticalrange});
$self->add_perfdata(sprintf "tablecache_fillrate=%.2f%%",
$self->{tablecache_fillrate});
} elsif ($params{mode} =~ /server::instance::tablelockcontention/) {
my $refkey = 'table_lock_contention'.($params{lookback} ? '_now' : '');
if ($self->{uptime} > 10800) { # MySQL Bug #30599
$self->add_nagios(
$self->check_thresholds($self->{$refkey}, "1", "2"),
sprintf "table lock contention %.2f%%", $self->{$refkey});
} else {
$self->check_thresholds($self->{$refkey}, "1", "2");
$self->add_nagios_ok(
sprintf "table lock contention %.2f%% (uptime < 10800)",
$self->{$refkey});
}
$self->add_perfdata(sprintf "tablelock_contention=%.2f%%;%s;%s",
$self->{table_lock_contention},
$self->{warningrange}, $self->{criticalrange});
$self->add_perfdata(sprintf "tablelock_contention_now=%.2f%%",
$self->{table_lock_contention_now});
} elsif ($params{mode} =~ /server::instance::tableindexusage/) {
my $refkey = 'index_usage'.($params{lookback} ? '_now' : '');
$self->add_nagios(
$self->check_thresholds($self->{$refkey}, "90:", "80:"),
sprintf "index usage %.2f%%", $self->{$refkey});
$self->add_perfdata(sprintf "index_usage=%.2f%%;%s;%s",
$self->{index_usage},
$self->{warningrange}, $self->{criticalrange});
$self->add_perfdata(sprintf "index_usage_now=%.2f%%",
$self->{index_usage_now});
} elsif ($params{mode} =~ /server::instance::tabletmpondisk/) {
my $refkey = 'pct_tmp_on_disk'.($params{lookback} ? '_now' : '');
$self->add_nagios(
$self->check_thresholds($self->{$refkey}, "25", "50"),
sprintf "%.2f%% of %d tables were created on disk",
$self->{$refkey}, $self->{delta_created_tmp_tables});
$self->add_perfdata(sprintf "pct_tmp_table_on_disk=%.2f%%;%s;%s",
$self->{pct_tmp_on_disk},
$self->{warningrange}, $self->{criticalrange});
$self->add_perfdata(sprintf "pct_tmp_table_on_disk_now=%.2f%%",
$self->{pct_tmp_on_disk_now});
} elsif ($params{mode} =~ /server::instance::openfiles/) {
$self->add_nagios(
$self->check_thresholds($self->{pct_open_files}, 80, 95),
sprintf "%.2f%% of the open files limit reached (%d of max. %d)",
$self->{pct_open_files},
$self->{open_files}, $self->{open_files_limit});
$self->add_perfdata(sprintf "pct_open_files=%.3f%%;%.3f;%.3f",
$self->{pct_open_files},
$self->{warningrange},
$self->{criticalrange});
$self->add_perfdata(sprintf "open_files=%d;%d;%d",
$self->{open_files},
$self->{open_files_limit} * $self->{warningrange} / 100,
$self->{open_files_limit} * $self->{criticalrange} / 100);
} elsif ($params{mode} =~ /server::instance::needoptimize/) {
foreach (@{$self->{fragmented}}) {
$self->add_nagios(
$self->check_thresholds($_->[1], 10, 25),
sprintf "table %s is %.2f%% fragmented", $_->[0], $_->[1]);
if ($params{name}) {
$self->add_perfdata(sprintf "'%s_frag'=%.2f%%;%d;%d",
$_->[0], $_->[1], $self->{warningrange}, $self->{criticalrange});
}
}
} elsif ($params{mode} =~ /server::instance::myisam/) {
$self->{engine_myisam}->nagios(%params);
$self->merge_nagios($self->{engine_myisam});
} elsif ($params{mode} =~ /server::instance::innodb/) {
$self->{engine_innodb}->nagios(%params);
$self->merge_nagios($self->{engine_innodb});
} elsif ($params{mode} =~ /server::instance::replication/) {
$self->{replication}->nagios(%params);
$self->merge_nagios($self->{replication});
}
}
}
package DBD::MySQL::Server;
use strict;
use Time::HiRes;
use IO::File;
use File::Copy 'cp';
use Data::Dumper;
{
our $verbose = 0;
our $scream = 0; # scream if something is not implemented
our $access = "dbi"; # how do we access the database.
our $my_modules_dyn_dir = ""; # where we look for self-written extensions
my @servers = ();
my $initerrors = undef;
sub add_server {
push(@servers, shift);
}
sub return_servers {
return @servers;
}
sub return_first_server() {
return $servers[0];
}
}
sub new {
my $class = shift;
my %params = @_;