为什么我们要对zabbix的数据库进行分区呢,因为随着时间的推移,数据库的表越来越大,这样一来,我们的查询效率就很低了,对此为了方便我们查询,我们有必要对zabbix数据库进行分区

我们可以去查看我们的MySQL的表的大小

这个写的挺详细的,适合小白

然后开始我们的分区

  1. 使用truncate命令清空zabbix 所有监控数据
  2. 先进入mysql –uzabbix –pZ@bbix@123
  3. use zabbix;
  4. show tables;
truncate table history;
optimize table history;

truncate table history_str;
optimize table history_str;

truncate table history_uint;
optimize table history_uint;

truncate table trends;
optimize table trends;

truncate table trends_uint; 
optimize table trends_uint; 

SET FOREIGN_KEY_CHECKS=0;
truncate table events;
SET FOREIGN_KEY_CHECKS=1;
optimize table events;

注意:这些命令会把zabbix所有的监控数据清空,只是清空监控数据,添加的主机,配置,拓扑图不会丢失。如果对监控数据比较看重的话注意备份数据库

truncate是删除了表,然后根据表结构重新建立。

  1. 创建sql文件
    vim partition.sql
DELIMITER $$
DROP PROCEDURE IF EXISTS `partition_create`$$
CREATE PROCEDURE `partition_create`(SCHEMANAME varchar(64), TABLENAME varchar(64), PARTITIONNAME varchar(64), CLOCK int)
BEGIN
        /*
           SCHEMANAME = The DB schema in which to make changes
           TABLENAME = The table with partitions to potentially delete
           PARTITIONNAME = The name of the partition to create
        */
        /*
           Verify that the partition does not already exist
        */
 
        DECLARE RETROWS INT;
        SELECT COUNT(1) INTO RETROWS
        FROM information_schema.partitions
        WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_description >= CLOCK;
 
        IF RETROWS = 0 THEN
        /*
           1. Print a message indicating that a partition was created.
           2. Create the SQL to create the partition.
           3. Execute the SQL from #2.
        */
        SELECT CONCAT( "partition_create(", 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$$
DELIMITER ;
DELIMITER $$
DROP PROCEDURE IF EXISTS `partition_drop`$$
CREATE PROCEDURE `partition_drop`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), DELETE_BELOW_PARTITION_DATE BIGINT)
BEGIN
        /*
           SCHEMANAME = The DB schema in which to make changes
           TABLENAME = The table with partitions to potentially delete
           DELETE_BELOW_PARTITION_DATE = Delete any partitions with names that are dates older than this one (yyyy-mm-dd)
        */
        DECLARE done INT DEFAULT FALSE;
        DECLARE drop_part_name VARCHAR(16);
 
        /*
           Get a list of all the partitions that are older than the date
           in DELETE_BELOW_PARTITION_DATE.  All partitions are prefixed with
           a "p", so use SUBSTRING TO get rid of that character.
        */
        DECLARE myCursor CURSOR FOR
        SELECT partition_name
        FROM information_schema.partitions
        WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND CAST(SUBSTRING(partition_name FROM 2) AS UNSIGNED) < DELETE_BELOW_PARTITION_DATE;
        DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
 
        /*
           Create the basics for when we need to drop the partition.  Also, create
           @drop_partitions to hold a comma-delimited list of all partitions that
           should be deleted.
        */
        SET @alter_header = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " DROP PARTITION ");
        SET @drop_partitions = "";
 
        /*
           Start looping through all the partitions that are too old.
        */
        OPEN myCursor;
        read_loop: LOOP
        FETCH myCursor INTO drop_part_name;
        IF done THEN
    LEAVE read_loop;
        END IF;
        SET @drop_partitions = IF(@drop_partitions = "", drop_part_name, CONCAT(@drop_partitions, ",", drop_part_name));
        END LOOP;
        IF @drop_partitions != "" THEN
        /*
           1. Build the SQL to drop all the necessary partitions.
           2. Run the SQL to drop the partitions.
           3. Print out the table partitions that were deleted.
        */
        SET @full_sql = CONCAT(@alter_header, @drop_partitions, ";");
        PREPARE STMT FROM @full_sql;
        EXECUTE STMT;
        DEALLOCATE PREPARE STMT;
 
        SELECT CONCAT(SCHEMANAME, ".", TABLENAME) AS `table`, @drop_partitions AS `partitions_deleted`;
        ELSE
        /*
           No partitions are being deleted, so print out "N/A" (Not applicable) to indicate
           that no changes were made.
        */
        SELECT CONCAT(SCHEMANAME, ".", TABLENAME) AS `table`, "N/A" AS `partitions_deleted`;
        END IF;
END$$
DELIMITER ;
DELIMITER $$
DROP PROCEDURE IF EXISTS `partition_maintenance`$$
CREATE PROCEDURE `partition_maintenance`(SCHEMA_NAME VARCHAR(32), TABLE_NAME VARCHAR(32), KEEP_DATA_DAYS INT, HOURLY_INTERVAL INT, CREATE_NEXT_INTERVALS INT)
BEGIN
        DECLARE OLDER_THAN_PARTITION_DATE VARCHAR(16);
        DECLARE PARTITION_NAME VARCHAR(16);
        DECLARE OLD_PARTITION_NAME VARCHAR(16);
        DECLARE LESS_THAN_TIMESTAMP INT;
        DECLARE CUR_TIME INT;
 
        CALL partition_verify(SCHEMA_NAME, TABLE_NAME, HOURLY_INTERVAL);
        SET CUR_TIME = UNIX_TIMESTAMP(DATE_FORMAT(NOW(), '%Y-%m-%d 00:00:00'));
 
        SET @__interval = 1;
        create_loop: LOOP
        IF @__interval > CREATE_NEXT_INTERVALS THEN
    LEAVE create_loop;
        END IF;
 
        SET LESS_THAN_TIMESTAMP = CUR_TIME + (HOURLY_INTERVAL * @__interval * 3600);
        SET PARTITION_NAME = FROM_UNIXTIME(CUR_TIME + HOURLY_INTERVAL * (@__interval - 1) * 3600, 'p%Y%m%d%H00');
        IF(PARTITION_NAME != OLD_PARTITION_NAME) THEN
    CALL partition_create(SCHEMA_NAME, TABLE_NAME, PARTITION_NAME, LESS_THAN_TIMESTAMP);
        END IF;
        SET @__interval=@__interval+1;
        SET OLD_PARTITION_NAME = PARTITION_NAME;
        END LOOP;
 
        SET OLDER_THAN_PARTITION_DATE=DATE_FORMAT(DATE_SUB(NOW(), INTERVAL KEEP_DATA_DAYS DAY), '%Y%m%d0000');
        CALL partition_drop(SCHEMA_NAME, TABLE_NAME, OLDER_THAN_PARTITION_DATE);
 
END$$
DELIMITER ;
DELIMITER $$
DROP PROCEDURE IF EXISTS `partition_verify`$$
CREATE PROCEDURE `partition_verify`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), HOURLYINTERVAL INT(11))
BEGIN
        DECLARE PARTITION_NAME VARCHAR(16);
        DECLARE RETROWS INT(11);
        DECLARE FUTURE_TIMESTAMP TIMESTAMP;
 
        /*
         * Check if any partitions exist for the given SCHEMANAME.TABLENAME.
         */
        SELECT COUNT(1) INTO RETROWS
        FROM information_schema.partitions
        WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_name IS NULL;
 
        /*
         * If partitions do not exist, go ahead and partition the table
         */
        IF RETROWS = 1 THEN
        /*
         * Take the current date at 00:00:00 and add HOURLYINTERVAL to it.  This is the timestamp below which we will store values.
         * We begin partitioning based on the beginning of a day.  This is because we don't want to generate a random partition
         * that won't necessarily fall in line with the desired partition naming (ie: if the hour interval is 24 hours, we could
         * end up creating a partition now named "p201403270600" when all other partitions will be like "p201403280000").
         */
        SET FUTURE_TIMESTAMP = TIMESTAMPADD(HOUR, HOURLYINTERVAL, CONCAT(CURDATE(), " ", '00:00:00'));
        SET PARTITION_NAME = DATE_FORMAT(CURDATE(), 'p%Y%m%d%H00');
 
        -- Create the partitioning query
        SET @__PARTITION_SQL = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " PARTITION BY RANGE(`clock`)");
        SET @__PARTITION_SQL = CONCAT(@__PARTITION_SQL, "(PARTITION ", PARTITION_NAME, " VALUES LESS THAN (", UNIX_TIMESTAMP(FUTURE_TIMESTAMP), "));");
 
        -- Run the partitioning query
        PREPARE STMT FROM @__PARTITION_SQL;
        EXECUTE STMT;
        DEALLOCATE PREPARE STMT;
        END IF;
END$$
DELIMITER ;
 
DELIMITER $$
DROP PROCEDURE IF EXISTS `partition_maintenance_all`$$
CREATE PROCEDURE`partition_maintenance_all`(SCHEMA_NAME VARCHAR(32))
BEGIN
               CALL partition_maintenance(SCHEMA_NAME, 'history', 90, 24, 14);
               CALL partition_maintenance(SCHEMA_NAME, 'history_log', 90, 24, 14);
               CALL partition_maintenance(SCHEMA_NAME, 'history_str', 90, 24, 14);
               CALL partition_maintenance(SCHEMA_NAME, 'history_text', 90, 24, 14);
               CALL partition_maintenance(SCHEMA_NAME, 'history_uint', 90, 24, 4);
               CALL partition_maintenance(SCHEMA_NAME, 'trends', 730, 24, 14);
               CALL partition_maintenance(SCHEMA_NAME, 'trends_uint', 730, 24, 14);
END$$
DELIMITER ;

说明:
CALL partition_maintenance(’<zabbix_db_name>’, ‘<table_name>’, <days_to_keep_data>, <hourly_interval>, <num_future_intervals_to_create>)

zabbix_db_name:库名
table_name:表名
days_to_keep_data:保存多少天的数据
hourly_interval:每隔多久生成一个分区
num_future_intervals_to_create:本次一共生成多少个分区

例如:
CALL partition_maintenance(SCHEMA_NAME, ‘history’, 90, 24, 14);

这个例子表示history表最多保存90天的数据,每隔24小时生成一个分区,这次一共生成14个分区

保存退出之后,执行以下命令

导入存储过程到zabbix中

mysql -uzabbix -pZ@bbix@123 zabbix < partition.sql

执行存储过程

mysql -uzabbix -pZ@bbix@123 zabbix -e “CALL partition_maintenance_all(‘zabbix’)” &>

/var/log/partition.log&

执行结束之后进入我们的MySQL查看我们有没有分区成功

mysql –uroot –p

password 

use zabbix;

show create table history;

如果出现有很多个partition就说明我们分区成功了

mysql trun_mysql

分区成功后我们再添加计划任务

[root@zabbix ~]# crontab -e

#/opt/mysql/mysql-5.7.31/bin/mysql这里指的是你数据库的运行路径,要填自己的路径别填错了
01 01 * * *  /opt/mysql/mysql-5.7.31/bin/mysql  -uzabbix -p Z@bbix@123 zabbix -e"CALL partition_maintenance_all('zabbix')" &>/var/log/partition.log

[root@zabbix ~]# crontab -l

mysql trun_mysql trun_02


这样就说明我们的定时任务添加完毕

提示:因为存储过程会老化,比如上面所说history表最多保存28天的数据,每隔24小时生成一个分区,这次一共生成14个分区,当生成第15个分区时存储过程就已经老化了,后面的监控数据就存储不了,会存在丢失监控数据,所以,需要定时执行调用存储过程。设置定时任务时间是通过每24小时会产生一个分区,这次一共生成14个分区,也就是说第15天就存储过程就会老化,那我们就设定每天1点调用存储过程创建一次(只要在14天以内的时间都允许)。

怎么删除指定分区历史数据,这点我们首先先获取我们想要删除的时间段,把它转化为时间戳

date -d $(date -d “-30 day” +%Y%m%d) +%s

DELETE FROM tb WHERE CreateTime>=‘2017-01-01 00:00:00’ AND CreateTime<=‘2017-02-01 00:00:00’ (删除指定时间,某一个时间段)

DELETE FROM tb WHERE CreateTime BETWEEN ‘2017-01-01 00:00:00’ AND ‘2017-02-01 00:00:00’(删除指定时间,某一天)

然后把得到的时间戳带入你的MySQL语句中,

先进去MySQL

mysql -uroot -p

use zabbix;

delete from history where ‘clock’ < 1614355200;

optimize table history;

delete from history_str where ‘clock’ < 1614355200;

optimize table history_str;

delete from history_uint where ‘clock’ < 1614355200;

optimize table history_uint;

delete from trends where ‘clock’ < 1614355200;

optimize table trends;

delete from trends_uint where ‘clock’ < 1614355200;

optimize table trends_uint;

delete from events where ‘clock’ < 1614355200;

optimize table events;