In the current implementation, both "free" and "available" use "real_free" member from "perfstat_memory_total_t" structure, see http://www-01.ibm.com/support/knowledgecenter/ssw_aix_61/com.ibm.aix.files/libperfstat.h.htm .

What should be the desired output? Is there any system tool that can serve as a reference?

I understand it should give similar results to Linux platform, so available should be free + cached. So we should calculate free memory as real_free - numperm.

wiper Err, it should be the other way around - free appears to be correct, we should calculate available as real_free + numperm.

I also understand that it should work like Linux platform. The result of vmstat on AIX seems doesn't include cached memory. I think it's better that free returns a value same as vmstat (available - cached).

# vmstat -v
4194304 memory pages
42509 free pages
78.7 numperm percentage
3132135 file pages

Fixed in development branch svn://svn.zabbix.com/branches/dev/ZBX-8513

(1) Documentation:

• upgrade notes
• what's new
• vm.memory.size notes (removed statement that on AIX available and free return the same values).

RESOLVED

sasha CLOSED

Looks fine, it's just strange that the numbers of free differ just a bit reported by zabbix_agent and "vmstat -v". In the following table source means:

• old - old binary (before this fix)
• new - new binary (after this fix)
• vmstat - values from vmstat multiplied by 4096
• empty - was not changed in this fix

Successfully tested.

Regarding Solaris, unfortunately using sysconf() it is not possible to get more information about physical memory except total and available.

Released in:

• pre-2.5.0 r52628