一、統計數據庫中每一個表所佔的空間：html
Zabbix歷史數據清理
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一週以前的歷史數據：sql
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!
/bin/bash
User=
"zabbixuser"
Passwd=
"zabbixpass"
Date=`
date
-d $(
date
-d
"-7 day"
+%Y%m%d) +%s`
#取7天以前的時間戳
$(
which
mysql) -u${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、添加到系統計劃任務：數據庫
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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：能夠使用truncate命令直接清空數據庫：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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若是想要刪除表的全部數據，truncate語句要比 delete 語句快。bash
由於 truncate 刪除了表，而後根據表結構從新創建它，而 delete 刪除的是記錄，並無嘗試去修改表。post
不過truncate命令雖然快，卻不像delete命令那樣對事務處理是安全的。ui
所以，若是咱們想要執行truncate刪除的表正在進行事務處理，這個命令就會產生退出併產生錯誤信息。url