Zabbix 6.4 OS-Ubunutu - VMware ESXI -Connection to Zabbix server localhost:10051

[[email protected]]

Good Day,

trust all is well,

i need some assitance i have installed Zabbix 6.4 on VMware ESXI, all is working 100% except the service stops every 5-6 days with the following error.

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Connection to Zabbix server "localhost:10051" refused. Possible reasons:
1. Incorrect "NodeAddress" or "ListenPort" in the "zabbix_server.conf" or server IP/DNS override in the "zabbix.conf.php";
2. Security environment (for example, SELinux) is blocking the connection;
3. Zabbix server daemon not running;
4. Firewall is blocking TCP connection.
Connection refused
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I have checked Node address its set to localhost:10051 i am not running HA mode.
i have disable appAmor but only recently still need to monito for the week.
i can still access the apache (web UI)

what can i check is this because of VMware?

Server specs:
16 vCPU
32 Gb Memory.

when i check log:
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LOG
root@twk-cpt-zbx01:~# tail -f /var/log/zabbix/zabbix_server.log
1297:20230507:161619.698 7: /usr/sbin/zabbix_server(free_database_cache+0x48) [0x564b94a3b2ec]
1297:20230507:161619.698 6: /usr/sbin/zabbix_server(+0x81350) [0x564b94842350]
1297:20230507:161619.698 5: /usr/sbin/zabbix_server(MAIN_ZABBIX_ENTRY+0x10e0) [0x564b948452f4]
1297:20230507:161619.698 4: /usr/sbin/zabbix_server(zbx_daemon_start+0x443) [0x564b94bae439]
1297:20230507:161619.698 3: /usr/sbin/zabbix_server(main+0x439) [0x564b948428dd]
1297:20230507:161619.698 2: /lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7f8841627d90]
1297:20230507:161619.698 1: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7f8841627e40]
1297:20230507:161619.698 0: /usr/sbin/zabbix_server(_start+0x25) [0x564b9483fd85]
1297:20230507:161619.698 [file:dbcache.c,line:4962] __zbx_shmem_malloc(): out of memory (requested 72 bytes)
1297:20230507:161619.698 [file:dbcache.c,line:4962] __zbx_shmem_malloc(): please increase TrendCacheSize configuration parameter
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[cyber]

That last line says, what you should do..." please increase TrendCacheSize configuration parameter"

[[email protected]]

Thank you Cyber,

i have increased this previously but didnt reboot. so i asume it only takes effect if you restart Zabbix or hard reboot Zabbix Server.

Below configs what is the best practice value for trendCache based on 5000 hosts


HistoryCacheSize=1024M

HistoryIndexCacheSize=32M

TrendCacheSize=128M

ValueCacheSize=1G

[Hamardaban]

Good day!
Please tell me how you installed the agent on VMware ESX ?
Perhaps there is an installation instruction somewhere?

[cyber]

TrendCache depends more on the item count, than host count. So if it dies again, increase some more. You should also see cache usage, if you monitor your server (official templates are available).

[[email protected]]

Cyber,

THank you currently its on 2.1%, so looks good so far, i will increase if this happens in the next week.

[[email protected]]

cyber up until what will the usage climb as when i check it is currently on 7.3% in 10 Days, is there a way to clear this after say 1 month, will this climb until it reach 100% and then fail again

[cyber]

I cannot tell that... Increase in usage is related to amount of hosts/triggers etc. Value, Trend and history caches contain data that is used for trigger calculations. It might stabilize at one point, but where I cannot predict... But in any case, If it starts to get close to 100% you should increase the size