zabbix历史数据相关表研究
history和trends相关表
history和trends都是存储历史数据的地方。一般是通过监控项(item)配置里、匹配更新监控项(item)和设置HouseKeeper tasks来设置保留数据的时长。
Housekeeper 会定期删除过期的数据。如果不是特别有意义，建议你把保留时间设置短一些， 如果想看以前的数 据图怎么办？这里趋势数据就派上用场了，一般只要小时平均即可这样话趋势据保留久一点即可，趋势数据的计算源数据来自history表。如果将history设置为0那么就只会获取item的值然后用于触发器，不会存历史数据到数据库。
监控项前端配置:
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history相关表
MariaDB [rtm]> show tables like 'history%'; +--------------------------+ | Tables_in_rtm (history%) | +--------------------------+ | history | | history_log | | history_str | | history_text | | history_uint | +--------------------------+-
history
history 表存放信息类型为浮点数的监控项历史数据，类型在配置监控项是指定
itemid: 监控项唯一标识id
clock: 时间戳整数部分
value： 监控项的值
ns： 纳秒数
MariaDB [rtm]> desc history; +--------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------+---------------------+------+-----+---------+-------+ | itemid | bigint(20) unsigned | NO | MUL | NULL | | | clock | int(11) | NO | | 0 | | | value | double(16,4) | NO | | 0.0000 | | | ns | int(11) | NO | | 0 | | +--------+---------------------+------+-----+---------+-------+ MariaDB [rtm]> select * from history limit 10; +-----------+------------+---------+----+ | itemid | clock | value | ns | +-----------+------------+---------+----+ | 300161484 | 1545404400 | 1.9616 | 0 | | 300161484 | 1545379200 | 2.3494 | 0 | | 300161484 | 1545382800 | 2.7355 | 0 | | 300161484 | 1545386400 | 3.3068 | 0 | | 300161484 | 1545390000 | 3.2508 | 0 | | 300161484 | 1545393600 | 4.2648 | 0 | | 300161484 | 1545397200 | 4.0263 | 0 | | 300161484 | 1545400800 | 2.7983 | 0 | | 300161485 | 1545404400 | 16.8910 | 0 | | 300161485 | 1545379200 | 20.5173 | 0 | +-----------+------------+---------+----+ -
history_log
history_log 表存放信息类型为日志的监控项历史数据，类型在配置监控项是指定
MariaDB [rtm]> desc history_log; +------------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +------------+---------------------+------+-----+---------+-------+ | id | bigint(20) unsigned | NO | PRI | NULL | | | itemid | bigint(20) unsigned | NO | MUL | NULL | | | clock | int(11) | NO | | 0 | | | timestamp | int(11) | NO | | 0 | | | source | varchar(64) | NO | | | | | severity | int(11) | NO | | 0 | | | value | text | NO | | NULL | | | logeventid | int(11) | NO | | 0 | | | ns | int(11) | NO | | 0 | | +------------+---------------------+------+-----+---------+-------+ -
history_str
history_str 表存放信息类型为字符的监控项历史数据，类型在配置监控项是指定
MariaDB [rtm]> desc history_str; +--------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------+---------------------+------+-----+---------+-------+ | itemid | bigint(20) unsigned | NO | MUL | NULL | | | clock | int(11) | NO | | 0 | | | value | varchar(255) | NO | | | | | ns | int(11) | NO | | 0 | | +--------+---------------------+------+-----+---------+-------+ MariaDB [rtm]> select * from history_str limit 2G; *************************** 1. row *************************** itemid: 23307 clock: 1545384507 value: localhost.localdomain ns: 410719216 *************************** 2. row *************************** itemid: 23312 clock: 1545384512 value: Linux localhost.localdomain 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 ns: 411996428 -
history_text
history_text 表存放信息类型为文本的监控项历史数据，类型在配置监控项是指定
MariaDB [rtm]> desc history_text; +--------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------+---------------------+------+-----+---------+-------+ | id | bigint(20) unsigned | NO | PRI | NULL | | | itemid | bigint(20) unsigned | NO | MUL | NULL | | | clock | int(11) | NO | | 0 | | | value | text | NO | | NULL | | | ns | int(11) | NO | | 0 | | +--------+---------------------+------+-----+---------+-------+ MariaDB [rtm]> select * from history_text limit 10; +---------+--------+------------+---------------------+-----------+ | id | itemid | clock | value | ns | +---------+--------+------------+---------------------+-----------+ | 1937748 | 30436 | 1545381354 | 10/11/2017 14:28:06 | 892072527 | | 1937749 | 28311 | 1545381364 | N/A | 146021861 | | 1937750 | 27186 | 1545381374 | N/A | 934199968 | | 1937751 | 26936 | 1545381376 | N/A | 146546842 | | 1937752 | 28936 | 1545381378 | N/A | 189324808 | | 1937753 | 24686 | 1545381380 | N/A | 89381118 | | 1937754 | 25061 | 1545381383 | N/A | 484549259 | | 1937755 | 28061 | 1545381385 | N/A | 699330874 | | 1937756 | 27061 | 1545381389 | N/A | 559602805 | | 1937757 | 30686 | 1545381391 | N/A | 303467948 | +---------+--------+------------+---------------------+-----------+ -
history_uint
history_unit 表存放信息类型为数字(无正负)的监控项历史数据，类型在配置监控项是指定
MariaDB [rtm]> desc history_uint; +--------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------+---------------------+------+-----+---------+-------+ | itemid | bigint(20) unsigned | NO | MUL | NULL | | | clock | int(11) | NO | | 0 | | | value | bigint(20) unsigned | NO | | 0 | | | ns | int(11) | NO | | 0 | | +--------+---------------------+------+-----+---------+-------+ MariaDB [rtm]> select * from history_uint limit 10; +-----------+------------+-------+----+ | itemid | clock | value | ns | +-----------+------------+-------+----+ | 100029541 | 1545404700 | 4311 | 0 | | 100029541 | 1545405000 | 4276 | 0 | | 100029541 | 1545405300 | 4242 | 0 | | 100029541 | 1545405600 | 4207 | 0 | | 100029541 | 1545405900 | 4172 | 0 | | 100029541 | 1545406200 | 4137 | 0 | | 100029541 | 1545406500 | 4102 | 0 | | 100029541 | 1545406800 | 4067 | 0 | | 100029541 | 1545407100 | 4032 | 0 | | 100029541 | 1545407400 | 3997 | 0 | +-----------+------------+-------+----+
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trends相关表
MariaDB [rtm]> show tables like 'trends%'; +-------------------------+ | Tables_in_rtm (trends%) | +-------------------------+ | trends | | trends_uint | +-------------------------+-
trends
itemid: 监控项唯一标识id
clock: 时间戳整数部分
num： 该小时内用了多少数据用于计算平均值、最小值、最大值
value_min： 趋势时间内最小值(趋势数据时间间隔为一小时)
value_avg： 趋势时间内平均值(趋势数据时间间隔为一小时)
value_max： 趋势时间内最大值(趋势数据时间间隔为一小时)
MariaDB [rtm]> desc trends; +-----------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-----------+---------------------+------+-----+---------+-------+ | itemid | bigint(20) unsigned | NO | PRI | NULL | | | clock | int(11) | NO | PRI | 0 | | | num | int(11) | NO | | 0 | | | value_min | double(16,4) | NO | | 0.0000 | | | value_avg | double(16,4) | NO | | 0.0000 | | | value_max | double(16,4) | NO | | 0.0000 | | +-----------+---------------------+------+-----+---------+-------+ MariaDB [rtm]> select * from trends limit 10; +--------+------------+-----+-----------+-----------+-----------+ | itemid | clock | num | value_min | value_avg | value_max | +--------+------------+-----+-----------+-----------+-----------+ | 23252 | 1538211600 | 60 | 0.0000 | 0.0006 | 0.0169 | | 23252 | 1538215200 | 60 | 0.0000 | 0.0008 | 0.0169 | | 23252 | 1538218800 | 60 | 0.0000 | 0.0008 | 0.0169 | | 23252 | 1538222400 | 60 | 0.0000 | 0.0003 | 0.0169 | | 23252 | 1538226000 | 60 | 0.0000 | 0.0008 | 0.0169 | | 23252 | 1538229600 | 60 | 0.0000 | 0.0017 | 0.0508 | | 23252 | 1538233200 | 60 | 0.0000 | 0.0011 | 0.0169 | | 23252 | 1538236800 | 60 | 0.0000 | 0.0014 | 0.0169 | | 23252 | 1538240400 | 60 | 0.0000 | 0.0008 | 0.0169 | | 23252 | 1538244000 | 60 | 0.0000 | 0.0003 | 0.0169 | +--------+------------+-----+-----------+-----------+-----------+ -
trends_unit
MariaDB [rtm]> desc trends_uint; +-----------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-----------+---------------------+------+-----+---------+-------+ | itemid | bigint(20) unsigned | NO | PRI | NULL | | | clock | int(11) | NO | PRI | 0 | | | num | int(11) | NO | | 0 | | | value_min | bigint(20) unsigned | NO | | 0 | | | value_avg | bigint(20) unsigned | NO | | 0 | | | value_max | bigint(20) unsigned | NO | | 0 | | +-----------+---------------------+------+-----+---------+-------+ MariaDB [rtm]> select * from trends_uint limit 10; +--------+------------+-----+-----------+-----------+-----------+ | itemid | clock | num | value_min | value_avg | value_max | +--------+------------+-----+-----------+-----------+-----------+ | 23271 | 1538211600 | 6 | 0 | 0 | 0 | | 23271 | 1538215200 | 6 | 0 | 0 | 0 | | 23271 | 1538218800 | 6 | 0 | 0 | 0 | | 23271 | 1538222400 | 6 | 0 | 0 | 0 | | 23271 | 1538226000 | 6 | 0 | 0 | 0 | | 23271 | 1538229600 | 6 | 0 | 0 | 0 | | 23271 | 1538233200 | 6 | 0 | 0 | 0 | | 23271 | 1538236800 | 6 | 0 | 0 | 0 | | 23271 | 1538240400 | 6 | 0 | 0 | 0 | | 23271 | 1538244000 | 6 | 0 | 0 | 0 | +--------+------------+-----+-----------+-----------+-----------+
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