話はこのようなものです.syslogと呼ばれるMySQLデータベースがあり、次のテーブルがあります:
Tables_in_syslog |
+-----------------------------+
| plugin_camm_syslog |
| plugin_camm_syslog_MonthDec |
| plugin_camm_syslog_MonthJan |
| plugin_camm_syslog_incoming
テーブルplugin_camm_syslog_incomingにはストレージ エンジン MEMORY があり、他はMyISAMです。
これは、毎月 1 日ごとに cron から実行されるスクリプトです。
<?php
# This script rotates the mysql syslog-ng database
# on a monthly basis. Place in "/etc/cron.monthly".
# To change to weekly/daily, adjust "$date" and place
# in the appropriate cron folder.
$link = mysql_connect("localhost", "syslogadmin", "sysadmin");
if (!$link) {
die("Could not connect: " . mysql_error());
}
echo "Connected successfully\n";
// make syslog the current db
$db_selected = mysql_select_db("syslog", $link);
if (!$db_selected) {
die ("Can\"t use syslog : " . mysql_error());
}
// Rename the table, appending short month
$last= mktime(0, 0, 0, date("m")-1, date("d"), date("Y"));
$drop= mktime(0, 0, 0, date("m")-3, date("d"), date("Y"));
$d=date("M", $last); $dd=date("M", $drop);
$date="Month$d"; $dropdate="Month$dd";
// drop old table
// drop 2 month old table
$result=mysql_query("DROP TABLE `plugin_camm_syslog_$dropdate`");
//$result=mysql_query("DROP TABLE `plugin_camm_syslog_$date`");
//make new date
$last= mktime(0, 0, 0, date("m")-1, date("d"), date("Y")); $d=date("M", $last);
$date="Month$d";
#echo "XX $date\n";
#die ("test $result:".mysql_error());
$result = mysql_query("ALTER TABLE `plugin_camm_syslog` RENAME `plugin_camm_syslog_$date`");
if (!$result) { die("Invalid query: " . mysql_error()); }
// Recreate the original table
$result="
CREATE TABLE `plugin_camm_syslog` (
`id` int(11) unsigned NOT NULL AUTO_INCREMENT,
`host` varchar(128) DEFAULT NULL,
`sourceip` varchar(45) NOT NULL,
`facility` varchar(10) DEFAULT NULL,
`priority` varchar(10) DEFAULT NULL,
`sys_date` datetime DEFAULT NULL,
`message` text,
`status` tinyint(4) NOT NULL DEFAULT '0',
`alert` smallint(3) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`id`,`sys_date` ),
KEY `facility` (`facility`),
KEY `priority` (`priority`),
KEY `sourceip` (`sourceip`),
KEY `status` (`status`),
KEY `alert` (`alert`),
KEY `status_date` (`status`,`sys_date`),
KEY `sys_date` (`sys_date`)
) ENGINE=MyISAM
DEFAULT CHARSET=latin1
COMMENT='camm plugin SYSLOG Data'
PARTITION BY RANGE ( dayofyear(sys_date)) (
PARTITION syslog_day0 VALUES LESS THAN (0) ENGINE = MyISAM,
PARTITION syslog_day14 VALUES LESS THAN (14) ENGINE = MyISAM,
PARTITION syslog_day28 VALUES LESS THAN (28) ENGINE = MyISAM,
PARTITION syslog_day42 VALUES LESS THAN (42) ENGINE = MyISAM,
PARTITION syslog_day56 VALUES LESS THAN (56) ENGINE = MyISAM,
PARTITION syslog_day70 VALUES LESS THAN (70) ENGINE = MyISAM,
PARTITION syslog_day84 VALUES LESS THAN (84) ENGINE = MyISAM,
PARTITION syslog_day98 VALUES LESS THAN (98) ENGINE = MyISAM,
PARTITION syslog_day112 VALUES LESS THAN (112) ENGINE = MyISAM,
PARTITION syslog_day126 VALUES LESS THAN (126) ENGINE = MyISAM,
PARTITION syslog_day140 VALUES LESS THAN (140) ENGINE = MyISAM,
PARTITION syslog_day154 VALUES LESS THAN (154) ENGINE = MyISAM,
PARTITION syslog_day168 VALUES LESS THAN (168) ENGINE = MyISAM,
PARTITION syslog_day182 VALUES LESS THAN (182) ENGINE = MyISAM,
PARTITION syslog_day196 VALUES LESS THAN (196) ENGINE = MyISAM,
PARTITION syslog_day210 VALUES LESS THAN (210) ENGINE = MyISAM,
PARTITION syslog_day224 VALUES LESS THAN (224) ENGINE = MyISAM,
PARTITION syslog_day238 VALUES LESS THAN (238) ENGINE = MyISAM,
PARTITION syslog_day252 VALUES LESS THAN (252) ENGINE = MyISAM,
PARTITION syslog_day266 VALUES LESS THAN (266) ENGINE = MyISAM,
PARTITION syslog_day280 VALUES LESS THAN (280) ENGINE = MyISAM,
PARTITION syslog_day294 VALUES LESS THAN (294) ENGINE = MyISAM,
PARTITION syslog_day308 VALUES LESS THAN (308) ENGINE = MyISAM,
PARTITION syslog_day322 VALUES LESS THAN (322) ENGINE = MyISAM,
PARTITION syslog_day336 VALUES LESS THAN (336) ENGINE = MyISAM,
PARTITION syslog_day350 VALUES LESS THAN (350) ENGINE = MyISAM,
PARTITION syslog_day364 VALUES LESS THAN (364) ENGINE = MyISAM,
PARTITION syslog_day369 VALUES LESS THAN (369) ENGINE = MyISAM
)
";
if (mysql_query($result)) {
echo "success in plugin-camm table creation.\n";
}
else {
echo "no table created.\n";
}
if ( mysql_query($result)) {
echo "success in table creation.\n";
} else {
echo "no table created.\n";
}
mysql_close($link);
$link = mysql_connect("localhost", "cacxt", "cacxt");
if (!$link) {
die("Could not connect: " . mysql_error());
}
echo "Connected successfully\n";
$db_selected = mysql_select_db("cacti", $link);
if (!$db_selected) {
die ("Can\"t use cacti : " . mysql_error());
}
$result=mysql_query("TRUNCATE TABLE `plugin_camm_tree2`");
$result=mysql_query("TRUNCATE TABLE `plugin_camm_temp`");
$result=mysql_query("TRUNCATE TABLE `plugin_camm_keys`");
$result=mysql_query("UPDATE `plugin_camm_rule` SET `actual_triggered` = '0';");
mysql_close($link);
?>
問題は、サーバーがその量のデータを処理できなくなり、毎月約 20 日サーバーがパフォーマンスの問題に直面していることです。私は MySQL 忍者ではありませんが、何が起こっているのかを理解しようとしていますが、インデックスの塗りつぶしが大きすぎるようです [サーバーが処理できる大きさ]
見る：
:/var/lib/mysql/syslog# ls -lh | grep G total 21G
-rw-rw---- 1 mysql mysql 2,8G 2012-12-15 00:50 plugin_camm_syslog_MonthDec#P#syslog_day350.MYD
-rw-rw---- 1 mysql mysql 1,5G 2013-01-31 14:12 plugin_camm_syslog_MonthDec#P#syslog_day350.MYI
-rw-rw---- 1 mysql mysql 1,6G 2012-12-29 00:46 plugin_camm_syslog_MonthDec#P#syslog_day364.MYD
-rw-rw---- 1 mysql mysql 2,0G 2013-01-14 00:46 plugin_camm_syslog_MonthJan#P#syslog_day14.MYD
-rw-rw---- 1 mysql mysql 1,1G 2013-01-28 08:01 plugin_camm_syslog_MonthJan#P#syslog_day14.MYI
-rw-rw---- 1 mysql mysql 2,1G 2013-01-28 05:41 plugin_camm_syslog_MonthJan#P#syslog_day28.MYD
-rw-rw---- 1 mysql mysql 1,1G 2013-01-28 08:01 plugin_camm_syslog_MonthJan#P#syslog_day28.MYI
-rw-rw---- 1 mysql mysql 1,7G 2013-02-11 00:46 plugin_camm_syslog#P#syslog_day42.MYD
-rw-rw---- 1 mysql mysql 1,7G 2013-02-21 07:29 plugin_camm_syslog#P#syslog_day56.MYD
今日、syslog をローテーションするために scrip を実行する必要があります。私の質問は、1 月と 2 月のデータが保持されるかということです。
または、誰かがインデックスの使用を減らすために何をすべきかアドバイスできますか?