一、统计数据库中每一个表所占的空间：html
Zabbix历史数据清理
SELECT table_name AS "Tables",round(((data_length + index_length) / 1024 / 1024), 2) "Size in MB" from information_schema.TABLES where table_schema = 'zabbix' ORDER BY (data_length + index_length) DESC;mysql
二、清理zabbix一周以前的历史数据：sql
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!
/bin/bash
User=
"zabbixuser"
Passwd=
"zabbixpass"
Date=`
date
-d $(
date
-d
"-7 day"
+%Y%m%d) +%s`
#取7天以前的时间戳
$(
which
mysql) -u${User} -p${Passwd} -e "
use zabbixdb;
DELETE FROM
history
WHERE
'clock'
< $Date;
optimize table
history
;
DELETE FROM history_str WHERE
'clock'
< $Date;
optimize table history_str;
DELETE FROM history_uint WHERE
'clock'
< $Date;
optimize table history_uint;
DELETE FROM history_text WHERE
'clock'
< $Date;
optimize table history_text;
DELETE FROM trends WHERE
'clock'
< $Date;
optimize table trends;
DELETE FROM trends_uint WHERE
'clock'
< $Date;
optimize table trends_uint;
DELETE FROM events WHERE
'clock'
< $Date;
optimize table events;
"
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三、添加到系统计划任务：数据库
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#remove the zabbix mysql data before 7 day's ago
0 3 * * 0
/usr/local/script/clearzabbix
.sh >
/usr/local/script/clearzabbix
.log
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另：能够使用truncate命令直接清空数据库：安全
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truncate table
history
;
truncate table history_uint;
truncate table history_str;
truncate table history_text;
truncate table trends;
truncate table trends_uint;
truncate table events;
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若是想要删除表的全部数据，truncate语句要比 delete 语句快。bash
由于 truncate 删除了表，而后根据表结构从新创建它，而 delete 删除的是记录，并无尝试去修改表。post
不过truncate命令虽然快，却不像delete命令那样对事务处理是安全的。ui
所以，若是咱们想要执行truncate删除的表正在进行事务处理，这个命令就会产生退出并产生错误信息。url