[Catalyst] FCGI automatic restart / memory leaks

[Daniel McBrearty]

IIRC you see this under mod_perl because of the way that memory is
shared between processes until it is written to, when a seperate copy
is created per process. It happens even with no leaks.

I have no idea whether FCGI has a similar mechanism, but just
something to maybe look at.


On 8/16/07, Tobias Kremer <list at funkreich.de> wrote:
> I just deployed our quite large Catalyst app and I'm seeing a constant increase
> in memory usage. Here's a current snapshop from top:
>
> PID USER   PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> 29342 www  16   0 67156  60m 3180 S    1  3.0   0:13.87 perl
> 29332 www  25   0 41052  34m 1204 S    0  1.7   0:00.01 perl
> 29333 www  25   0 68424  60m 3172 S    0  3.0   0:13.42 perl
> 29334 www  22   0 68944  60m 3308 S    0  3.0   0:13.58 perl
> 29335 www  16   0 67428  60m 3168 S    0  3.0   0:13.86 perl
> 29336 www  16   0 68736  60m 3192 S    0  3.0   0:13.88 perl
> 29337 www  16   0 67392  59m 3172 S    0  2.9   0:14.02 perl
> 29338 www  18   0 66404  59m 3180 S    0  2.9   0:13.49 perl
> 29339 www  17   0 69216  62m 3172 S    0  3.1   0:14.12 perl
> 29340 www  16   0 67992  60m 3188 S    0  3.0   0:13.89 perl
> 29341 www  16   0 68812  60m 3180 S    0  3.0   0:14.88 perl
>
> We're using lighttpd and handle the starting of the FCGI server manually. Is
> there a way to have the FCGI children restart once in a while without having to
> restart the whole FCGI process manager (and bringing down the application for a
> few seconds)? Something like Apache's MaxRequestsPerChild directive would be
> cool.
>
> Then it's time to go memory leak hunting :(
>
> Thanks a lot!
>
> --Tobias
>
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