What does Zabbix message "Free disk space is less than XX% on volume Shared memory" mean?

Solution 1:

/dev/shm is a temporary filesystem mounted usually under /run/shm for IPC (inter process communication) which - in my opinion - should not be monitored in your case.

Solution 2:

If you don't wish to monitor the Shared memoryon your system, you can easyly add it to the filter expression.

• For this go to "Administration"->"General"->"Regular expressions"
• Select the entry Storage devices for SNMP discovery entry
• Add the Shared memoryentry to the list

At the same time you could also remove the various /run/xxx filesystems from discovery.

My current expression is:

^(Physical memory|Virtual memory|Memory buffers|Cached memory|Swap space|Shared memory|/sys/fs/cgroup|/run/lock|/dev/shm|/run/user|/run/user/0|/run)$