zabbix db partition

zabbix db partition

在做zabbix的性能优化时，有时候在db的数据量比较大的时候，需要对表进行partition操作，这样可以在数据查询减少用时。并且由于使用了partition，我们可以自己实现历史数据的删除操作，这样就可以禁用zabbix的housekeeping功能。简单的说下再2.0.x版本的zabbix中进行partition的操作：1.备份数据，如果使用proxy的结构的话，调整ProxyOfflineBuffer,加大数据在offline情况的缓存时间，这样在partition调整完后数据会自动补充。确定需要partition的表，并更改表结构（使用clock进行parttition，partition key必须是primarykey的一部分），涉及的表主要是存储历史相关数据的表：history,history_uint,history_text,history_log,history_str表结构更改：ALTER TABLE `history_log` DROP PRIMARY KEY, ADD PRIMARY KEY (`itemid`,`id`,`clock`); ALTER TABLE `history_log` DROP KEY `history_log_2`; ALTER TABLE `history_text` DROP PRIMARY KEY, ADD PRIMARY KEY (`itemid`,`id`,`clock`); ALTER TABLE `history_text` DROP KEY `history_text_2`;剩下的history_str,history,history_uint 3个表不需要做更改。2.按clock进行分区例子：ALTER TABLE `history_uint` PARTITION BY RANGE( clock ) ( PARTITION p20140101 VALUES LESS THAN (UNIX_TIMESTAMP("2014-01-02 00:00:00")), PARTITION p20140102 VALUES LESS THAN (UNIX_TIMESTAMP("2014-01-03 00:00:00")), PARTITION p20140103 VALUES LESS THAN (UNIX_TIMESTAMP("2014-01-04 00:00:00")), PARTITION p20140104 VALUES LESS THAN (UNIX_TIMESTAMP("2014-01-05 00:00:00")), PARTITION p20140105 VALUES LESS THAN (UNIX_TIMESTAMP("2014-01-06 00:00:00")), PARTITION p20140106 VALUES LESS THAN (UNIX_TIMESTAMP("2014-01-07 00:00:00")) );把需要分区的表都进行相同的操作。3.设置存储规则，并使用cronjob来实现自动partition操作mysql -u xxx -pxxx xxx < ./partition.sql其中partition.sql的内容如下：DELIMITER // DROP PROCEDURE IF EXISTS `zabbix_server`.`create_zabbix_partitions` // CREATE PROCEDURE `zabbix_server`.`create_zabbix_partitions` () BEGIN CALL zabbix_server.create_next_partitions("zabbix_server","history"); CALL zabbix_server.create_next_partitions("zabbix_server","history_log"); CALL zabbix_server.create_next_partitions("zabbix_server","history_str"); CALL zabbix_server.create_next_partitions("zabbix_server","history_text"); CALL zabbix_server.create_next_partitions("zabbix_server","history_uint"); CALL zabbix_server.drop_old_partitions("zabbix_server","history"); CALL zabbix_server.drop_old_partitions("zabbix_server","history_log"); CALL zabbix_server.drop_old_partitions("zabbix_server","history_str"); CALL zabbix_server.drop_old_partitions("zabbix_server","history_text"); CALL zabbix_server.drop_old_partitions("zabbix_server","history_uint"); END // DROP PROCEDURE IF EXISTS `zabbix_server`.`create_next_partitions` // CREATE PROCEDURE `zabbix_server`.`create_next_partitions` (SCHEMANAME varchar(64), TABLENAME varchar(64)) BEGIN DECLARE NEXTCLOCK timestamp; DECLARE PARTITIONNAME varchar(16); DECLARE CLOCK int; SET @totaldays = 7; SET @i = 1; createloop: LOOP SET NEXTCLOCK = DATE_ADD(NOW(),INTERVAL @i DAY); SET PARTITIONNAME = DATE_FORMAT( NEXTCLOCK, 'p%Y%m%d' ); SET CLOCK = UNIX_TIMESTAMP(DATE_FORMAT(DATE_ADD( NEXTCLOCK ,INTERVAL 1 DAY),'%Y-%m-%d 00:00:00')); CALL zabbix_server.create_partition( SCHEMANAME, TABLENAME, PARTITIONNAME, CLOCK ); SET @i=@i+1; IF @i > @totaldays THEN LEAVE createloop; END IF; END LOOP; END // DROP PROCEDURE IF EXISTS `zabbix_server`.`drop_old_partitions` // CREATE PROCEDURE `zabbix_server`.`drop_old_partitions` (SCHEMANAME varchar(64), TABLENAME varchar(64)) BEGIN DECLARE OLDCLOCK timestamp; DECLARE PARTITIONNAME varchar(16); DECLARE CLOCK int; SET @mindays = 30; SET @maxdays = @mindays+4; SET @i = @maxdays; droploop: LOOP SET OLDCLOCK = DATE_SUB(NOW(),INTERVAL @i DAY); SET PARTITIONNAME = DATE_FORMAT( OLDCLOCK, 'p%Y%m%d' ); CALL zabbix_server.drop_partition( SCHEMANAME, TABLENAME, PARTITIONNAME ); SET @i=@i-1; IF @i <= @mindays THEN LEAVE droploop; END IF; END LOOP; END // DROP PROCEDURE IF EXISTS `zabbix_server`.`create_partition` // CREATE PROCEDURE `zabbix_server`.`create_partition` (SCHEMANAME varchar(64), TABLENAME varchar(64), PARTITIONNAME varchar(64), CLOCK int) BEGIN DECLARE RETROWS int; SELECT COUNT(1) INTO RETROWS FROM `information_schema`.`partitions` WHERE `table_schema` = SCHEMANAME AND `table_name` = TABLENAME AND `partition_name` = PARTITIONNAME; IF RETROWS = 0 THEN SELECT CONCAT( "create_partition(", SCHEMANAME, ",", TABLENAME, ",", PARTITIONNAME, ",", CLOCK, ")" ) AS msg; SET @sql = CONCAT( 'ALTER TABLE `', SCHEMANAME, '`.`', TABLENAME, '`', ' ADD PARTITION (PARTITION ', PARTITIONNAME, ' VALUES LESS THAN (', CLOCK, '));' ); PREPARE STMT FROM @sql; EXECUTE STMT; DEALLOCATE PREPARE STMT; END IF; END // DROP PROCEDURE IF EXISTS `zabbix_server`.`drop_partition` // CREATE PROCEDURE `zabbix_server`.`drop_partition` (SCHEMANAME varchar(64), TABLENAME varchar(64), PARTITIONNAME varchar(64)) BEGIN DECLARE RETROWS int; SELECT COUNT(1) INTO RETROWS FROM `information_schema`.`partitions` WHERE `table_schema` = SCHEMANAME AND `table_name` = TABLENAME AND `partition_name` = PARTITIONNAME; IF RETROWS = 1 THEN SELECT CONCAT( "drop_partition(", SCHEMANAME, ",", TABLENAME, ",", PARTITIONNAME, ")" ) AS msg; SET @sql = CONCAT( 'ALTER TABLE `', SCHEMANAME, '`.`', TABLENAME, '`', ' DROP PARTITION ', PARTITIONNAME, ';' ); PREPARE STMT FROM @sql; EXECUTE STMT; DEALLOCATE PREPARE STMT; END IF; END // DELIMITER ;查看存储过程：select name from mysql.proc; show create procedure create_partition;cronjob形式的调用：mysql -B -xxx -pxxx xxx -e "CALL create_zabbix_partitions();"4.测试partition的结果：1)查看表结构CREATE TABLE `history` ( `itemid` bigint(20) unsigned NOT NULL, `clock` int(11) NOT NULL DEFAULT '0', `value` double(16,4) NOT NULL DEFAULT '0.0000', `ns` int(11) NOT NULL DEFAULT '0', KEY `history_1` (`itemid`,`clock`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 /*!50100 PARTITION BY RANGE ( clock) (PARTITION p20140101 VALUES LESS THAN (1388592000) ENGINE = InnoDB, PARTITION p20140102 VALUES LESS THAN (1388678400) ENGINE = InnoDB, PARTITION p20140103 VALUES LESS THAN (1388764800) ENGINE = InnoDB, PARTITION p20140104 VALUES LESS THAN (1388851200) ENGINE = InnoDB, PARTITION p20140105 VALUES LESS THAN (1388937600) ENGINE = InnoDB, PARTITION p20140106 VALUES LESS THAN (1389024000) ENGINE = InnoDB, PARTITION p20140107 VALUES LESS THAN (1389110400) ENGINE = InnoDB, PARTITION p20140108 VALUES LESS THAN (1389196800) ENGINE = InnoDB, PARTITION p20140109 VALUES LESS THAN (1389283200) ENGINE = InnoDB, PARTITION p20140110 VALUES LESS THAN (1389369600) ENGINE = InnoDB) */2)explain查看执行计划explain partitions xxx5.关闭housekeeping，并验证host update percent的情况1)DisableHousekeeping=12)select b.hostname ,c.ip,a.update_percent as uppercent from ( select b.hostid,ROUND(IFNULL(a.aa,0)*100/b.bb,2) as update_percent from (select hostid,count(*) as aa from items where lastclock > UNIX_TIMESTAMP()-1800 and delay < 900 and hostid in (select hostid from hosts where status=0) and status = 0 group by hostid ) a RIGHT JOIN (select hostid,count(*) as bb from items where delay < 900 and status = 0 and hostid in (select hostid from hosts where status=0) group by hostid) b ON a.hostid=b.hostid)a,(select hostid,lower(host) as hostname from hosts where status=0)b, (select hostid,ip from interface where type='1')c where a.hostid=b.hostid and b.hostid=c.hostid order by uppercent;

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