61057Re: mod_perl crashing / hanging
- Oct 1, 2004Alex Greg wrote:
> Geoffrey Young wrote:[...]
>Yes because calling the shell is fairly slow if there are any
> Thanks for your response. Sorry I wasn't clear; the httpd processes
> don't actually kill the server, they just slow Apache right down to the
> point at which it doesn't respond to requests any more. I am still able
> to get onto the box and kill the processes etc. without having to do a
> hard reboot or anything. My question is what's causing Apache to get
> into the state where it can't fork any more shells from Perl.
>>> This is because a shell call to date ($date = `date`;) is failing - this
>>> is most likely what's causing the failure to fork we see above.
>> if you want to avoid that shell call try POSIX::strftime() instead.
> We have quite a lot of calls via backticks throughout our code - and not
> just for things like date that are trivially replaceable. Would you
> recommend replacing these as far as possible?
perl-modules you could use these instead and it will certainly give you
a performance boost.
What calls do you make, are these custom programs? If not I'd take a
look at CPAN maybe someone has already written a Perl-Module which does
exactly what you need else you could maybe write it your own. I have
done this for example librsvg because I wanted to avoid calls to the
shell inside my httpd-processes.
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