Am Montag, 9. Juli 2007 13:53 schrieb Killhead:
> Hi All,
>
>
>
> I like to implement the following in mod_fcgid:
>
>
>
> - An rlimit restriction for each process that have spawned of
> mod_fcgid (a php binary)
>
>
>
> I tried the following in arch/unix/fcgid_proc_unix.c on line 100
>
> ( on the end of the function ap_unix_create_privileged_process )
>
As far as I know, there are some restrictions to rlimit settings. In the
normal case some can only be done by the super user. Have you checked your
rights to do so ?
>
>
>
>
> struct rlimit reslim;
>
> reslim.rlim_cur = 40;
>
> reslim.rlim_max = 40;
>
> apr_procattr_limit_set(attr, APR_LIMIT_NPROC, &reslim);
>
>
>
> return apr_proc_create(newproc, newprogname, newargs, env, attr, p);
>
> }
>
>
>
>
>
> This sets the NPROC for my php processes to 40 (good :-) )
>
>
>
> But my mod_fcgid gets errors after a few seconds, because (I think) itself
> can only spawn 40 processes.
>
>
>
> Is there a way to set rlimit only on the spawned process, and not on the
> main process of fast_cgid itself ?
>
So you have to do the rlimit setting in the spawned process (I think this has
been done by fork ?). First I'm not really sure about the NPROC variable.
If it expresses the number of parallel processes this should not run out.
On the other hand you might want to set this variable to reload the fcgi
process when it has spawned some amount of subprocesses (handled an amount of
requests). So I think if you get such an error, try to shut down the current
fcgi process (better would be to cancel the process when it reached an amount
of NPROC-1 (NPROC-5 or whatever) processes, that a fresh one would be
started.
I don't think that there is a way to set rlimits on child processes, since
they don't have rights to do so. You would have to install them as suid root
if you want to do privileged operations in them. But take care with such
operations.
>
>
> Regards,
>
> Tom
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