[syslog-ng] Do stats cause memory leak

Evan Rempel erempel at uvic.ca
Sat Jun 3 23:07:36 UTC 2017


So it looks like the latest git head no longer compiles on Redhat 6. It 
is using g_atomic_pointer_and which requires glib2 2.30+ and Redhat 6 
only has glib2 2.28

Looks like I will not be able to test this :-( nor get this issue fixed 
in our infrastructure.

Evan.

On 06/03/2017 02:08 PM, Scheidler, Balázs wrote:
> My guess that it is related to #1517 instead, albeit stats counters 
> were worked on recently. If #1517 does not fix this, please report it 
> again.
>
>
> -- 
> Bazsi
>
> On Wed, May 31, 2017 at 9:02 AM, Fekete, Róbert 
> <robert.fekete at balabit.com <mailto:robert.fekete at balabit.com>> wrote:
>
>     There is also this issue that might be related (don't know if it
>     is solved by the above PR or not):
>     https://github.com/balabit/syslog-ng/issues/1494
>     <https://github.com/balabit/syslog-ng/issues/1494>
>
>     On Wed, May 31, 2017 at 8:28 AM, Czanik, Péter
>     <peter.czanik at balabit.com <mailto:peter.czanik at balabit.com>> wrote:
>
>         Hi,
>
>         https://github.com/balabit/syslog-ng/pull/1505
>         <https://github.com/balabit/syslog-ng/pull/1505> seems to
>         address memory problems. If you use my git head packages, I
>         can add this patch for you and see if it resolves your problems.
>
>         Bye,
>
>         Peter Czanik (CzP) <peter.czanik at balabit.com
>         <mailto:peter.czanik at balabit.com>>
>         Balabit / syslog-ng upstream
>         https://www.balabit.com/blog/author/peterczanik/
>         <https://www.balabit.com/blog/author/peterczanik/>
>         https://twitter.com/PCzanik
>
>         On Wed, May 31, 2017 at 4:28 AM, Evan Rempel <erempel at uvic.ca
>         <mailto:erempel at uvic.ca>> wrote:
>
>             We are running git head download post 3.9.1 and the memory
>             footprint seems to continually grow.
>
>             Looking at the statistics for queued messages I found
>             none, but discovered that we have nearly 22,000
>             statistic sets for a total of 68195 tracked statistics.
>             % /usr/local/sbin/syslog-ng-ctl stats | wc -l
>             68195
>
>             It it possible that all of these statistics take up a
>             non-trivial amount of RAM?
>
>             USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START 
>              TIME COMMAND
>             root      1489 79.2 61.5 12134140
>             <tel:%281%29%20213%204140> 10139760
>             <tel:%281%29%20013%209760> ?  Ssl  Apr24 41581:22
>             /usr/local/sbin/syslog-ng
>
>             That is a 12GB footprint after 1 month of uptime.
>
>             Evan.
>

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