1

我使用下面的 perl 脚本来终止用户完成的所有选择连接，但我想为root用户设置一个例外，因为 root 查询要么很重要，要么出于备份目的。

下面是我的代码

#!/usr/bin/perl -w

use DBI;
use strict;

$| = 1;

#------------------------------------------------------------------------------
# !!! Configure check time and timeout. These are both in seconds.

my $check =      15;    # check processes every $check seconds
my $slow_time =  60;    # stop processes that run for >= $slow_time seconds

# !!! Configure log file - All slow queries also get logged to this file

my $logfile =    "./check_mysql_query.log"; # log slow queries to this file

# !!! Configure the database connection parameters

my $db_string = "dbi:mysql:mysql";  # DBI resource to connect to
my $db_user =   "root";     # DBI username to connect as
my $db_pass =   "password";     # DBI password to connect with

# !!! Configure path to sendmail program

my $sendmail_bin = "/usr/sbin/sendmail";

#
#------------------------------------------------------------------------------


my ($dbh,$sth,$sth2,$thread,$state,$time,$query,$explain);

print "connecting\n";
my $opt = {
    'RaiseError'=>0,
    'PrintError'=>0
};
$dbh = DBI->connect($db_string,$db_user,$db_pass,$opt);
unless ($dbh) {
    print "Error: Unable to connect to database: $DBI::errstr\n";
    exit 1;
}

$SIG{'TERM'} = sub {
    print "caught sig TERM!\nexiting!\n";
    $dbh->disconnect;
    exit 1;
};

print "preparing\n";
unless ($sth = $dbh->prepare("show full processlist")) {
    print "error preparing query: $DBI::errstr\nexiting!\n";
    $dbh->disconnect;
    exit 1;
}

print "initialized.. starting loop\n";
while(1) {
    unless ($sth->execute) {
        print "statement execute failed: ".$sth->errstr."\nexiting!\n";
        last;
    }
    while(my @tmp = $sth->fetchrow) {
        $thread = $tmp[0];
        $state = $tmp[4];
        $time = $tmp[5];
        $query = $tmp[7];
        if ($state eq "Query" && $query =~ /^SELECT/ && $time >= $slow_time) {
            print "killing slow query thread=$thread state=$state time=$time\n";
            $dbh->do("kill $thread");
            unless (log_query($logfile,$query)) {
                print "log_query failed! exiting!\n";
                last;
            }


        }
    }
    sleep($check);
}

$sth->finish;
$dbh->disconnect;

exit 1;


sub log_query {
    my ($file,$query) = @_;
    unless (open(O,">>".$file)) {
        print "error opening log file '$file': $!\n";
        return undef;
    }
    print O $query."\n-----\n";
    close(O);
    return 1;
}

脚本信用：http ://code.google.com/p/mysql-killquery/ 为了简单起见，我删除了大部分脚本代码。

4

1 回答 1

2

我想我从阅读中了解到，您的第二列将是用户。因此，假设 root 以用户“root”身份登录数据库，那么您可能可以这样做：

while(my @tmp = $sth->fetchrow) {
    next if $tmp[1] eq 'root';
    ...
}
于 2012-04-06T15:13:34.997 回答