linux上zabbix-server优化（配置文件和数据库）
一、：修改配置文件
vim /usr/local/zabbix/etc/zabbix_server.conf
Timeout=20 (大概426行)
二、：直接使用优化脚本
#!/bin/bash
A=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep StartPollers= | awk '{print $1}'`
B=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep StartTrappers= | awk '{print $1}'`
C=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep StartDBSyncers= | awk '{print $1}'`
D=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep StartPingers= | awk '{print $1}'`
E=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep StartPollersUnreachable= | awk '{print $1}'`
F=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep StartDiscoverers= | awk '{print $1}'`
G=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep CacheUpdateFrequency=`
H=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep HistoryCacheSize= | awk '{print $1}'`
I=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep TrendCacheSize= | awk '{print $1}'`
J=`cat -n /usr/local/zabbix/etc/zabbix_server.conf | grep ValueCacheSize= | awk '{print $1}'`
sed -i ''"$A"'c StartPollers=500' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$B"'c StartTrappers=200' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$C"'c StartDBSyncers=50 ' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$D"'c StartPingers=500' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$E"'c StartPollersUnreachable=500' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$F"'c StartDiscoverers=120' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$G"'c CacheUpdateFrequency=300' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$H"'c HistoryCacheSize=512M' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$I"'c TrendCacheSize=512M' /usr/local/zabbix/etc/zabbix_server.conf
sed -i ''"$J"'c ValueCacheSize=1G' /usr/local/zabbix/etc/zabbix_server.conf
/etc/init.d/zabbix_server restart
三、：优化数据库
使用tmpfs文件系统
mkdir /zabbixtmp
chown mysql:mysql /zabbixtmp
echo "tmpfs /zabbixtmp tmpfs rw,size=400m,nr_inodes=10k,mod=0700,uid=mysql,gid=mysql 0 0 " >> /etc/fstab
注意文件的大小设置，一般情况下设成物理内存的8%-10%
我的数据库配置如下：
[mysqld]
# Disabling symbolic-links is recommended to prevent assorted security risks
tmpdir=/zabbixtmp ---文件系统
#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
#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 =5G #一般设为服务器物理内存的70%-80%
innodb_flush_method =O_DIRECT
innodb_support_xa =0
query_cache_size=128M
join_buffer_size=128M
read_buffer_size=128M
read_rnd_buffer_size=128M
key_buffer=128M
systemctl restart mariadb
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四、：zabbix页面：
1:管理----一般----右上角---其他---600s
2:模板中的自动发现---资源周期不足，时间改短（列如 7d）
3：也可以 zabbix模板中批量修改成为zabbix agent(active)模式(模板中监控项中，修改为主动模式)
再做个任务计划，每天重启一次，清理僵尸进程
0 4 * * * /etc/init.d/zabbix_server restart > /dev/null 2>&1
0 4 * * * /etc/init.d/grafana-server restart > /dev/null 2>&1
0 4 * * * /mnt/cache.sh
vim cache.sh
#! /bin/bash
# cache释放：
sync
sync
echo 3 > /proc/sys/vm/drop_caches