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Zabbix proxy: Utilization of history syncer processes over 75%

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  • marcino
    Junior Member
    • Nov 2024
    • 13

    #1

    Zabbix proxy: Utilization of history syncer processes over 75%

    Hi,
    I have a Zabbix monitoring setup in a cluster. I switched the application over to the second server. After that, I started getting critical alerts about "Utilization of history syncer processes over 75%" on the proxy servers. Additionally, I see "Utilization of LLD worker processes over 75%" on the central server – and this is happening on both nodes, even on the one that's currently the slave server.

    This issue did not occur before switching the servers. Both servers have exactly the same configuration. I'm using Zabbix server version 7.0.8, and I have around 2500 hosts added. The database size is approximately 2 TB.


    My Zabbix server configuration looks like this:

    Code:
    LogFile=/var/log/zabbix/zabbix_server.log
    LogFileSize=64
    DebugLevel=4
    PidFile=/run/zabbix/zabbix_server.pid
    SocketDir=/run/zabbix
    DBHost=xxx.xxx.xxx.xxx
    DBName=zabbix
    DBUser=zabbix
    DBPassword=password
    StartHistoryPollers=10
    StartTrappers=10
    StartEscalators=5
    SNMPTrapperFile=/var/log/snmptrap/snmptrap.log
    CacheSize=32G
    StartDBSyncers=16
    HistoryCacheSize=2G
    HistoryIndexCacheSize=2G
    TrendCacheSize=2G
    TrendFunctionCacheSize=1G
    ValueCacheSize=6G
    Timeout=4
    LogSlowQueries=3000
    StartLLDProcessors=4
    StatsAllowedIP=127.0.0.1
    StartReportWriters=10
    WebServiceURL=http://localhost:10053/report
    HANodeName=zbx01
    NodeAddress=xxx.xxx.xxx.xxx:10051
    My Zabbix proxy configuration looks like this:

    Code:
    ProxyMode=0
    Server=xxx.xxx.xxx.xxx;yyy.yyy.yyy.yyy
    Hostname=proxy01
    LogFile=/var/log/zabbix/zabbix_proxy.log
    LogFileSize=64
    PidFile=/run/zabbix/zabbix_proxy.pid
    SocketDir=/run/zabbix
    DBHost=127.0.0.1
    DBName=zabbix
    DBUser=zabbix
    DBPassword=password
    ProxyOfflineBuffer=12
    ProxyConfigFrequency=180
    DataSenderFrequency=5
    StartPollers=40
    StartTrappers=20
    SNMPTrapperFile=/var/log/snmptrap/snmptrap.log
    HousekeepingFrequency=1
    CacheSize=2G
    StartDBSyncers=10
    HistoryCacheSize=1G
    Timeout=30
    LogSlowQueries=3000
    StatsAllowedIP=127.0.0.1

    Has anyone encountered a similar issue, and what could be the possible cause?

    Click image for larger version  Name:	image.png Views:	0 Size:	49.8 KB ID:	502756
    Last edited by marcino; 06-05-2025, 19:25.
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