zabbix性能调优

7oi76i

报警问题:
Too many processes on
zabbix poller processes more than 75% busy
zabbix unreachable poller processes more than 75% busy


1.通过Zabbix agent采集数据的设备处于moniting的状态但是此时机器死机或其他原因导致zabbix agent死掉server获取不到数据，此时unreachable poller
就会升高。

2.通过Zabbix agent采集数据的设备处于moniting的状态但是server向agent获取数据时时间过长，经常超过server甚至的timeout时间，此时unreachable poller就会升高。


优化思想：
1.确保zabbix内部组件性能处于被监控状态(调优的基础！)

2.使用硬件性能足够好的服务器

3.不同角色分开，使用各自独立的服务器

4.使用active主动模式

5.zabbixtmp使用tmpfs文件系统
               
6.使用分布式部署

7.调整MySQL性能

8.调整Zabbix自身配置



优化部署：
1.度量zabbix性能
通过Zabbix的NVPS(每秒处理数值数)来衡量其性能，在Zabbix的dashboard上有一个粗略的估值


2.获得zabbix内部组件工作状态



3.使用tmpfs文件系统
cd /
mkdir zabbixtmp
chown mysql:mysql zabbixtmp
vi /etc/fstab #配置/etc/fstab文件
tmpfs /zabbixtmp tmpfs rw,size=400m,nr_inodes=10k,mod=0700,uid=mysql,gid=mysql 0 0

在配置/etc/fstab参数中需要注意文件的大小设置，一般情况下设成物理内存的8%-10%。

4.使用active模式以及proxy分布式监控
zabbix_server端当主机数量过多的时候,由Server端去收集数据，zabbix会出现严重的性能问题，主要表现如下:
(1)当被监控端达到一个量级的时候，web操作很卡,容易出现502
(2)图层断裂
(3)开启的进程(pollar)太多，即使减少iteam数量，以后加入一定量的机器也会有问题
优化考虑方向:
a.添加proxy节点或Node模式做分布式监控
b.调整agentd为主动模式

被监控端zabbix_Agentd.conf配置
vim zabbix_Agentd.conf
LogFile = /tmp/zabbix_agentd.log
StartAgents=0
ServerActive=ip
Hostname=
RefreshActiveChecks=1800
BufferSize=200
Timeout=10

Serverd端zabbix_server.conf配置调整
StartPollers=100
StartTrappers=200

zabbix模板中批量修改成为zabbix agent(active)模式

5.zabbix mysql调优
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql

# Disabling symbolic-links is recommended to prevent assorted security risks
tmpdir=/zabbixtmp
#network        
connect_timeout =60
wait_timeout =5000
max_connections =400
max_allowed_packet =16M
max_connect_errors =400
#limits
tmp_table_size =256M
max_heap_table_size =64M
table_cache =256
#logs
slow_query_log_file =/var/log/slowquery.log

log_error =/var/log/mysql-error.log
long_query_time =10
slow_query_log =1
#innodb

#innodb_data_file_path =ibdata1:128M;ibdata2:128M:autoextend:max:4096M
innodb_file_per_table =1     #每个table一个文件
innodb_status_file =1

innodb_additional_mem_pool_size =128M
innodb_buffer_pool_size =2800M  #一般设为服务器物理内存的70%-80%
innodb_flush_method =O_DIRECT
#innodb_io_capacity =1000
innodb_support_xa =0
innodb_log_file_size =64M  # zabbix数据库属于写入较多的数据库，因此设置大一点可以避免MySQL持续将log文件flush到表中。
不过有一个副作用,就是启动和关闭数据库会变慢一点。
innodb_log_buffer_size =32M
symbolic-links=0
#log-queries-not-using-indexes
thread_cache_size=4  #这个值似乎会影响show global status输出中Threads_created per Connection的hit rate
当设置成4的时候,有3228483 Connections和5840 Threads_created,hit rate达到了99.2%Threads_created这个数值应该越小越好。
query_cache_size=128M
#join_buffer_size=512K
join_buffer_size=128M
read_buffer_size=128M
read_rnd_buffer_size=128M
key_buffer=128M
innodb_flush_log_at_trx_commit=2
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
#DsiableHousekeeper=1  #使用分区表时,关闭Houerkeeper

6.调整zabbix工作进程数量
vim zabbix_server.conf
StartPollers=90
StartPingers=10
StartPollersUnreacheable=80
StartIPMIPollers=10
StartTrappers=20
StartDBSyncers=8
LogSlowQueries=1000

6.zabbix db partition

step 1.准备相关表
ALTER TABLE `acknowledges` DROP PRIMARY KEY, ADD KEY `acknowledgedid` (`acknowledgeid`);
ALTER TABLE `alerts` DROP PRIMARY KEY, ADD KEY `alertid` (`alertid`);
ALTER TABLE `auditlog` DROP PRIMARY KEY, ADD KEY `auditid` (`auditid`);
ALTER TABLE `events` DROP PRIMARY KEY, ADD KEY `eventid` (`eventid`);
ALTER TABLE `service_alarms` DROP PRIMARY KEY, ADD KEY `servicealarmid` (`servicealarmid`);
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`;


step2.设置每月的分区
以下步骤请在第一步的所有表中重复，下例是为events表创建2011-5到2011-12之间的月度分区。
ALTER TABLE `events` PARTITION BY RANGE( clock ) (
PARTITION p201105 VALUES LESS THAN (UNIX_TIMESTAMP("2011-06-01 00:00:00")),
PARTITION p201106 VALUES LESS THAN (UNIX_TIMESTAMP("2011-07-01 00:00:00")),
PARTITION p201107 VALUES LESS THAN (UNIX_TIMESTAMP("2011-08-01 00:00:00")),
PARTITION p201108 VALUES LESS THAN (UNIX_TIMESTAMP("2011-09-01 00:00:00")),
PARTITION p201109 VALUES LESS THAN (UNIX_TIMESTAMP("2011-10-01 00:00:00")),
PARTITION p201110 VALUES LESS THAN (UNIX_TIMESTAMP("2011-11-01 00:00:00")),
PARTITION p201111 VALUES LESS THAN (UNIX_TIMESTAMP("2011-12-01 00:00:00")),
PARTITION p201112 VALUES LESS THAN (UNIX_TIMESTAMP("2012-01-01 00:00:00"))
);

step3.设置每日的分区
以下步骤请在第一步的所有表中重复，下例是为history_uint表创建5.15到5.22之间的每日分区。
ALTER TABLE `history_uint` PARTITION BY RANGE( clock ) (
PARTITION p20110515 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-16 00:00:00")),
PARTITION p20110516 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-17 00:00:00")),
PARTITION p20110517 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-18 00:00:00")),
PARTITION p20110518 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-19 00:00:00")),
PARTITION p20110519 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-20 00:00:00")),
PARTITION p20110520 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-21 00:00:00")),
PARTITION p20110521 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-22 00:00:00")),
PARTITION p20110522 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-23 00:00:00"))
);


手动维护分区：
增加新分区
ALTER TABLE `history_uint` ADD PARTITION (
PARTITION p20110523 VALUES LESS THAN (UNIX_TIMESTAMP("2011-05-24 00:00:00"))
);

删除分区(使用Housekeepeing)
ALTER TABLE `history_uint` DROP PARTITION p20110515;


step4.自动每日分区
确认已经在step3的时候为history表正确创建了分区。
以下脚本自动drop和创建每日分区,默认只保留最近3天,如果你需要更多天的，请修改
@mindays 这个变量。


不要忘记将这条命令加入到你的cron中！
mysql -B -h localhost -u zabbix -pPASSWORD zabbix -e "CALL create_zabbix_partitions();"


自动创建分区的脚本:
https://github.com/xsbr/zabbixzo ... utopartitioning.sql


DELIMITER //
DROP PROCEDURE IF EXISTS `zabbix`.`create_zabbix_partitions` //
CREATE PROCEDURE `zabbix`.`create_zabbix_partitions` ()
BEGIN
CALL zabbix.create_next_partitions("zabbix","history");
CALL zabbix.create_next_partitions("zabbix","history_log");
CALL zabbix.create_next_partitions("zabbix","history_str");
CALL zabbix.create_next_partitions("zabbix","history_text");
CALL zabbix.create_next_partitions("zabbix","history_uint");
CALL zabbix.drop_old_partitions("zabbix","history");
CALL zabbix.drop_old_partitions("zabbix","history_log");
CALL zabbix.drop_old_partitions("zabbix","history_str");
CALL zabbix.drop_old_partitions("zabbix","history_text");
CALL zabbix.drop_old_partitions("zabbix","history_uint");
END //
DROP PROCEDURE IF EXISTS `zabbix`.`create_next_partitions` //
CREATE PROCEDURE `zabbix`.`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.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`.`drop_old_partitions` //
CREATE PROCEDURE `zabbix`.`drop_old_partitions` (SCHEMANAME varchar(64), TABLENAME varchar(64))
BEGIN
DECLARE OLDCLOCK timestamp;
DECLARE PARTITIONNAME varchar(16);
DECLARE CLOCK int;
SET @mindays = 3;
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.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`.`create_partition` //
CREATE PROCEDURE `zabbix`.`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`.`drop_partition` //
CREATE PROCEDURE `zabbix`.`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 ;

小结：优化的思想就是当被机器越来越多时
1.        增加zabbix工作进程数量
2.        采用active模式,由agent端主动发送数据
3.        采用proxy进行分布式监控
4.        mysql调优