zabbix获取不到proxy端的数据

    zabbix告警

    More than 100 items having missing data for more than 10 minutes

    

    查看zabbix-Administration-Queue-Overview by proxy

    发现大量的等待item

    

    原因分析：

    1.server端与proxy端时间不同步

    2.server端分配的缓存不够

    3.server端分配的线程不够

    4.server端负载比较大{CPU,IO,MEM}

    解决方法：

    1.查看服务器资源负载状态，排除服务器本身原因

        htop   iotop iostat 

    2.查看zabbix_server有没有出现 Zabbix poller processes more than 75% busy 告警

        修改配置文件增大线程数和缓存

        vim /usr/local/zabbix/etc/zabbix_server.conf
        StartPollers=500
        StartPollersUnreachable=50
        StartTrappers=30
        StartDiscoverers=6
        CacheSize=1G
        CacheUpdateFrequency=300
        StartDBSyncers=20
        HistoryCacheSize=512M
        TrendCacheSize=256M
        HistoryTextCacheSize=80M
        ValueCacheSize=1G

    3.查看服务端与代理端的时间是不是同步的

        crontab -e
        */3 */1 * * * /usr/sbin/ntpdate -u 202.120.2.101 &> /dev/null

    4.重启server端与proxy端服务