zabbix上怎样对mysql数据库做分区表
发布时间：2021-12-22 18:18:14 所属栏目：MySql教程 来源：互联网
导读：本篇内容介绍了zabbix上怎么对mysql数据库做分区表的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！ 独立表空间设置： innodb_file_per_table=1 修改表
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本篇内容介绍了“zabbix上怎么对mysql数据库做分区表”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！ 独立表空间设置： innodb_file_per_table=1 修改表索引： zabbix3.2以上版本跳过此步骤 mysql> Alter table history_text drop primary key, add index (id), drop index history_text_2, add index history_text_2 (itemid, id); Query OK, 0 rows affected (0.49 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> Alter table history_log drop primary key, add index (id), drop index history_log_2, add index history_log_2 (itemid, id); Query OK, 0 rows affected (2.71 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql> 创建存储过程： 增加分区的存储过程： DELIMITER $$CREATE PROCEDURE `partition_create`(SCHEMANAME varchar(64), TABLENAME varchar(64), PARTITIONNAME varchar(64), CLOCK int)BEGIN /* SCHEMANAME = The DB schema in which to make changes TABLENAME = The table with partitions to potentially delete PARTITIONNAME = The name of the partition to create */ /* Verify that the partition does not already exist */ DECLARE RETROWS INT; SELECT COUNT(1) INTO RETROWS FROM information_schema.partitions WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_description >= CLOCK; IF RETROWS = 0 THEN /* 1. Print a message indicating that a partition was created. 2. Create the SQL to create the partition. 3. Execute the SQL from #2. */ SELECT CONCAT( "partition_create(", SCHEMANAME, ",", TABLENAME, ",", PARTITIONNAME, ",", CLOCK, ")" ) AS msg; SET @sql = CONCAT( 'ALTER TABLE ', SCHEMANAME, '.', TABLENAME, ' ADD PARTITION (PARTITION ', PARTITIONNAME, ' VALUES LESS THAN (', CLOCK, '));' ); PREPARE STMT FROM @sql; EXECUTE STMT; DEALLOCATE PREPARE STMT; END IF;END$$DELIMITER ; 删除分区的存储过程： DELIMITER $$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 ; 维护分区的存储过程： DELIMITER $$CREATE PROCEDURE `partition_maintenance`(SCHEMA_NAME VARCHAR(32), TABLE_NAME VARCHAR(32), KEEP_DATA_DAYS INT, HOURLY_INTERVAL INT, CREATE_NEXT_INTERVALS INT)BEGIN DECLARE OLDER_THAN_PARTITION_DATE VARCHAR(16); DECLARE PARTITION_NAME VARCHAR(16); DECLARE OLD_PARTITION_NAME VARCHAR(16); DECLARE LESS_THAN_TIMESTAMP INT; DECLARE CUR_TIME INT; CALL partition_verify(SCHEMA_NAME, TABLE_NAME, HOURLY_INTERVAL); SET CUR_TIME = UNIX_TIMESTAMP(DATE_FORMAT(NOW(), '%Y-%m-%d 00:00:00')); SET @__interval = 1; create_loop: LOOP IF @__interval > CREATE_NEXT_INTERVALS THEN LEAVE create_loop; END IF; SET LESS_THAN_TIMESTAMP = CUR_TIME + (HOURLY_INTERVAL * @__interval * 3600); SET PARTITION_NAME = FROM_UNIXTIME(CUR_TIME + HOURLY_INTERVAL * (@__interval - 1) * 3600, 'p%Y%m%d%H00'); IF(PARTITION_NAME != OLD_PARTITION_NAME) THEN CALL partition_create(SCHEMA_NAME, TABLE_NAME, PARTITION_NAME, LESS_THAN_TIMESTAMP); END IF; SET @__interval=@__interval+1; SET OLD_PARTITION_NAME = PARTITION_NAME; END LOOP; SET OLDER_THAN_PARTITION_DATE=DATE_FORMAT(DATE_SUB(NOW(), INTERVAL KEEP_DATA_DAYS DAY), '%Y%m%d0000'); CALL partition_drop(SCHEMA_NAME, TABLE_NAME, OLDER_THAN_PARTITION_DATE);END$$DELIMITER ; 检查分区、创建第一个分区的存储过程： DELIMITER $$CREATE PROCEDURE `partition_verify`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), HOURLYINTERVAL INT(11))BEGIN DECLARE PARTITION_NAME VARCHAR(16); DECLARE RETROWS INT(11); DECLARE FUTURE_TIMESTAMP TIMESTAMP; /* * Check if any partitions exist for the given SCHEMANAME.TABLENAME. */ SELECT COUNT(1) INTO RETROWS FROM information_schema.partitions WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_name IS NULL; /* * If partitions do not exist, go ahead and partition the table */ IF RETROWS = 1 THEN /* * Take the current date at 00:00:00 and add HOURLYINTERVAL to it. This is the timestamp below which we will store values. * We begin partitioning based on the beginning of a day. This is because we don't want to generate a random partition * that won't necessarily fall in line with the desired partition naming (ie: if the hour interval is 24 hours, we could * end up creating a partition now named "p201403270600" when all other partitions will be like "p201403280000"). */ SET FUTURE_TIMESTAMP = TIMESTAMPADD(HOUR, HOURLYINTERVAL, CONCAT(CURDATE(), " ", '00:00:00')); SET PARTITION_NAME = DATE_FORMAT(CURDATE(), 'p%Y%m%d%H00'); -- Create the partitioning query SET @__PARTITION_SQL = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " PARTITION BY RANGE(`clock`)"); SET @__PARTITION_SQL = CONCAT(@__PARTITION_SQL, "(PARTITION ", PARTITION_NAME, " VALUES LESS THAN (", UNIX_TIMESTAMP(FUTURE_TIMESTAMP), "));"); -- Run the partitioning query PREPARE STMT FROM @__PARTITION_SQL; EXECUTE STMT; DEALLOCATE PREPARE STMT; END IF;END$$DELIMITER ; 将上面4个存储过程语句写到一个sql文件里，partition_call.sql 执行：mysql -uzabbix -p'zabbix' zabbix < partition_call.sql 例如： mysql> CALL partition_maintenance('zabbix', 'history', 7, 24, 7); 这个例子就是history表最多保存7天的数据，每隔24小时生成一个分区，这次一共生成7个分区 统一调用存储过程： DELIMITER $$ CREATE PROCEDURE `partition_maintenance_all`(SCHEMA_NAME VARCHAR(32))BEGIN CALL partition_maintenance(SCHEMA_NAME, 'history', 28, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'history_log', 28, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'history_str', 28, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'history_text', 28, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'history_uint', 28, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'trends', 730, 24, 14); CALL partition_maintenance(SCHEMA_NAME, 'trends_uint', 730, 24, 14);END$$ DELIMITER ; 将这条语句保存成sql文件 partition_all.sql，再次导入存储过程 mysql -uzabbix -p'zabbix' zabbix < partition_all.sql 计划任务每天调用一次： 注意： 若数据量比较大，首次执行的时间较长，请使用nohup执行（我当时执行了15个小时左右，这期间zabbix是无法正常工作的，获取的agent数据不展示,但数据不会丢失） nohup time mysql -uzabbix -pzabbix zabbix -e "CALL partition_maintenance_all('zabbix');" &> /tmp/file.txt & 后面只需要调用这个存储过程就可以了，每天执行一次： mysql -uzabbix -pzabbix zabbix -e "CALL partition_maintenance_all('zabbix');" 写成crontab: # crontab -e 0 1 * * * /data/tools/mysql/bin/mysql -uzabbix -pzabbix zabbix -e "CALL partition_maintenance_all('zabbix');" 执行脚本： mysql> CALL partition_maintenance('zabbix', 'history', 28, 24, 14); +-----------------------------------------------------------+ | msg | +-----------------------------------------------------------+ | partition_create(zabbix,history,p201404160000,1397718000) | +-----------------------------------------------------------+ 1 row in set (0.39 sec) +-----------------------------------------------------------+ | msg | +-----------------------------------------------------------+ | partition_create(zabbix,history,p201404170000,1397804400) | +-----------------------------------------------------------+ 1 row in set (0.51 sec) mysql> CALL partition_maintenance_all('zabbix'); +----------------+--------------------+ | table | partitions_deleted | +----------------+--------------------+ | zabbix.history | N/A | +----------------+--------------------+ 1 row in set (0.01 sec) （编辑：威海站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
