Zabbix Server Not Running

[garethmorgan]

I am hoping someone had come across this issue before, running Zabbix for past few months and all of a sudden it just stopped

Zabbix server is running No localhost:10051
Zabbix server version
Zabbix frontend version 7.2.4 New update available
High availability cluster Disabled

zabbix_server (Zabbix) 7.2.4
Revision c34078a4563 25 February 2025, compilation time: Feb 25 2025 07:46:29

Installed on debian 12 with mariadb 10.11.11

error is showing db warning
Jun 20 09:08:03 sysmon01 mariadbd[2725]: 2025-06-20 9:08:03 45958 [Warning] Aborted connection 45958 to db: 'zabbix' user: 'zabbix' host: 'localhost' (Got an error reading communication >
Jun 20 09:08:03 sysmon01 mariadbd[2725]: 2025-06-20 9:08:03 45957 [Warning] Aborted connection 45957 to db: 'zabbix' user: 'zabbix' host: 'localhost' (Got an error reading communication >
Jun 20 09:08:04 sysmon01 systemd[1]: zabbix-server.service: Control process exited, code=exited, status=1/FAILURE

Restarted service does not fix the issue. There have been no config changes and both zabbix and mariadb are on same server.

Any help much appreciated

[garethmorgan]

Looking more into this and found a line in the log file relating to cache size

74931:20250620:160955.471 [file:dbconfig.c,line:242] __zbx_shmem_malloc(): out of memory (requested 32 bytes)
74931:20250620:160955.471 [file:dbconfig.c,line:242] __zbx_shmem_malloc(): please increase CacheSize configuration parameter

increasing the following cache sizes in zabbix_server.config fixed my issue

CacheSize=2G
HistoryIndexCacheSize=512M
ValueCacheSize=512M

You may need to adjust size depending on your specific environment