Re: Solaris 11 memory usage

[Martin Pala]

Hi Nestor,

you can use something like this to get the distribution (will record the 
memstat output + user space distribution ... processes by RSS):

        if memory usage > 80% then exec "/bin/sh -c 'exec >> /tmp/memstat.$$; 
echo ___________ `date` ___________; echo ::memstat | sudo mdb -k; prstat -c -s 
rss 1 10'" 


There was fix for memory usage report for Solaris in Monit 5.7 ... please can 
you upgrade to Monit 5.9? If the problem will persist - is the system where 
Monit is running 32-bit or 64-bit? Is it the Solaris zone?


Regards,
Martin


> On 20 Oct 2014, at 22:04, Nestor Urquiza <address@hidden> wrote:
> 
> Hi Martin,
> 
> Is there a way to put monit in debug mode so we get more information about 
> the memory distribution at the moment of the alert?
> 
> One thing we have noticed is that regardless how many cycles we wait to 
> alert, the succeed message comes in the next cycle after the alert which is 
> really weird.
> 
> Thanks,
> 
> - Nestor
> 
> On Sun, Oct 19, 2014 at 12:32 PM, Nestor Urquiza <address@hidden> wrote:
> I am sorry about the examples but yes we do get memory utilization spikes:
> 
> "mem usage of 82.6% matches resource limit [mem usage>80.0%],"
> 
> It is difficult to get that information at the time of the alert though. Is 
> there a way to put monit on debug mode or something to get exactly the memory 
> utilization distribution?
> 
> Right now everything is alright:
> 
> $ sudo monit status
> 
> ...
> 
> System 'server'
> 
>   status                            Running
> 
>   monitoring status                 Monitored
> 
>   load average                      [0.13] [0.12] [0.11]
> 
>   cpu                               0.3%us 1.4%sy 0.0%wa
> 
>   memory usage                      11822268 kB [35.2%]
> 
>   swap usage                        0 kB [0.0%]
> 
>   data collected                    Sun, 19 Oct 2014 12:23:47
> 
> ...
> 
> 
> 
> $ echo ::memstat | sudo mdb -k
> 
> Page Summary                Pages                MB  %Tot
> 
> ------------     ----------------  ----------------  ----
> 
> Kernel                     591587              2310    7%
> 
> ZFS File Data             1089502              4255   13%
> 
> Anon                       999345              3903   12%
> 
> Exec and libs               50239               196    1%
> 
> Page cache                 249081               972    3%
> 
> Free (cachelist)          3821104             14926   46%
> 
> Free (freelist)           1587621              6201   19%
> 
> 
> Total                     8388479             32767
> 
> 
> 
> 
> 
> Thanks,
> 
> - Nestor
> 
> 
> 
> 
> 
> 
> On Sat, Oct 18, 2014 at 4:22 PM, Martin Pala <address@hidden> wrote:
> Hi,
> 
> the attached error message ("cpu system usage ...") is for CPU test ... not 
> related to memory usage. High "cpu system" usage may be for example sign of 
> heavy disk I/O activity and/or swapping (memory shortage) - check vmstat 
> output for details.
> 
> If the memory usage report is problem, please can you provide output of "echo 
> ::memstat | mdb -k" and "monit status" (just the System service part is 
> sufficient).
> 
> 
> Regards,
> Martin
> 
> 
> 
> > On 16 Oct 2014, at 16:41, Nestor Urquiza <address@hidden> wrote:
> >
> > Hi guys,
> >
> > Since we went from Solaris 10 to 11 we have seen an increase monit alerts 
> > related to memory resource utilization. We used to get no alerts even when 
> > we set the memorty threshold really low, for example:
> >
> > "...cpu system usage of 45.8% matches resource limit [cpu system 
> > usage>40.0%]"
> >
> >
> > We have incremented the threshold to 90% but still we get alerts.
> >
> > Could it be that the way monit decides what is free memory in Solaris is 
> > incorrect when using ZFS 
> > http://serverfault.com/questions/378392/how-should-i-monitor-memory-usage-performance-in-sunos-solaris
> >
> > We are running monit version 5.5 BTW which has been working fine for ages.
> >
> > Perhaps version 5.9 has done something in that regard as I read the release 
> > notes ( http://mmonit.com/monit/changes/ ) are allowing to monitor generic 
> > device strings (not related really but worth to ask).
> >
> > Thanks!
> >
> > - Nestor
> >
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