Zabbix server issue while monitoring vmware vcenter

[sca_ebe]

Hi everyone,

I would like to ask some advice about a strange behaviour of my Zabbix Server.
Zabbix server 2.4.7 : Centos 7
Dedicated Databases servers
Dedicated Frontend web servers.

So I'm using Zabbix to monitor only Virtual Machine (around 3000) with the template provided by zabbix. (and the zabbix server himself, but this is the only host with agent)
I had some troubble to tune the Zabbix server parameters to have something stable, mainly the VMwareTimeout. Here is my zabbix_server.conf :

LogFile=/var/log/zabbix/zabbix_server.log
LogFileSize=0
DBHost=****
DBName=****
DBUser=****
DBPassword=****
StartPollers=5
StartTimers=2
StartVMwareCollectors=10
VMwareCacheSize=256M
VMwareTimeout=60
SNMPTrapperFile=/var/log/snmptrap/snmptrap.log
ListenIP=****
CacheSize=256M
StartDBSyncers=4
HistoryCacheSize=16M
HistoryIndexCacheSize=8M
TrendCacheSize=64M
ValueCacheSize=8M
Timeout=4
AlertScriptsPath=/usr/lib/zabbix/alertscripts
ExternalScripts=/usr/lib/zabbix/externalscripts
LogSlowQueries=3000

The whole thing was working pretty fine for about a day, but suddently this :






A little zoom :





I'm really confused about what is going on. And if there is a link between the Busy poller process and the history write cache.

I restarted the zabbix-server process at around 14h00, and it seems to be working fine again, but I would really appreciate your suggestions / advices

Thanks!

[sca_ebe]

I just realized that is the wrong place for this topic, sorry about that. Can an admin move it to the troubbleshooting section please?

[sca_ebe]

Little bump to move this thread in appropriate section, and maybe some help please