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From Bob Kinney <bc98kin...@yahoo.com>
Subject Re: [users@httpd] Apache eating memory
Date Mon, 15 May 2006 23:18:16 GMT
It seems to me that I recently read about this apparent (literally) issue.
I think it was on one of Red Hat's magazines.  It had to do with diparities
in the way that ps reports memory usage.  If I recall correctly, ps will
report the memory for each forked process as if it was a new instance of
the program itself.  In other words, a program using 20MB of memory forks
seven 5MB processes will appear to be using 7x25MB or 175MB, rather than
20+7x5MB or 35MB, which is actually the case.

Or something like that.

--- Girts <girts@4id.lv> wrote:

> I'm using slackware 10.2, php 4.4.1 and apache 2.0.55. Does any of these 
> have somekind of memory leaks ?
> 
> ldd httpd
>         libssl.so.0.9.7 => /usr/local/lib/libssl.so.0.9.7 (0x40024000)
>         libcrypto.so.0.9.7 => /usr/local/lib/libcrypto.so.0.9.7 (0x40054000)
>         libaprutil-0.so.0 => /www/lib/libaprutil-0.so.0 (0x4014d000)
>         libgdbm.so.3 => /usr/lib/libgdbm.so.3 (0x40162000)
>         libdb-4.2.so => /lib/libdb-4.2.so (0x40168000)
>         libexpat.so.0 => /usr/lib/libexpat.so.0 (0x4023b000)
>         libapr-0.so.0 => /www/lib/libapr-0.so.0 (0x4025b000)
>         librt.so.1 => /lib/librt.so.1 (0x4027c000)
>         libm.so.6 => /lib/libm.so.6 (0x4028f000)
>         libcrypt.so.1 => /lib/libcrypt.so.1 (0x402b2000)
>         libnsl.so.1 => /lib/libnsl.so.1 (0x402e0000)
>         libpthread.so.0 => /lib/libpthread.so.0 (0x402f6000)
>         libdl.so.2 => /lib/libdl.so.2 (0x40349000)
>         libc.so.6 => /lib/libc.so.6 (0x4034e000)
>         /lib/ld-linux.so.2 (0x40000000)
> 
> Compiled in modules:
>   core.c
>   prefork.c
>   http_core.c
>   mod_cgi.c
>   mod_negotiation.c
>   mod_actions.c
>   mod_userdir.c
>   mod_so.c
> 
> Loaded Modules: core prefork http_core mod_cgi mod_negotiation 
> mod_actions mod_userdir mod_so mod_access mod_auth mod_auth_anon 
> mod_charset_lite mod_cache mod_include mod_log_config mod_log_forensic 
> mod_logio mod_env mod_mime_magic mod_cern_meta mod_headers mod_unique_id 
> mod_setenvif mod_ssl mod_mime mod_status mod_autoindex mod_asis mod_info 
> mod_dir mod_imap mod_speling mod_alias mod_rewrite sapi_apache2 mod_security
> 
> >You need to be more specific about httpd and OS versions, as well as a list
> of the modules used.
> >
> >There have been memory leaks in some modules in the past, like a leak in the
> handling of rewrite maps for example. You could also search the Apache bug
> site.
> >
> >-ascs
> >
> >-----Original Message-----
> >From: Girts [mailto:girts@4id.lv] 
> >Sent: Monday, May 15, 2006 9:00 AM
> >To: users@httpd.apache.org
> >Subject: [users@httpd] Apache eating memory
> >
> >  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> > 8520 www       10   0  414m 320m 4896 S  0.0 36.2   0:08.08 httpd
> > 8631 www        9   0  195m 191m 3816 S  0.0 21.7   0:15.50 httpd
> > 8511 www        9   0  182m 178m 4944 S  0.0 20.2   0:06.49 httpd
> > 8516 www        9   0 20016  15m 4428 S  0.0  1.8   0:00.93 httpd
> > 8526 www       10   0 19476  15m 3916 S  0.0  1.8   0:05.41 httpd
> > 8513 www        9   0 17772  14m 4828 S  0.0  1.6   0:04.39 httpd
> > 8512 www        9   0 16920  13m 4784 S  0.0  1.5   0:01.66 httpd
> > 8518 www        9   0 16832  13m 4712 S  0.0  1.5   0:01.41 httpd
> > 8514 www        9   0 16452  12m 4764 S  0.0  1.5   0:02.43 httpd
> > 8515 www        9   0 16224  12m 4752 S  0.0  1.4   0:03.54 httpd
> > 8517 www        9   0 15920  12m 4776 S  0.0  1.4   0:02.10 httpd
> > 8519 www        9   0 15680  12m 4732 S  0.0  1.4   0:02.12 httpd
> > 8528 www       10   0 19656  11m 3708 S  0.0  1.3   0:02.51 httpd
> > 8630 www       11   0 15344  11m 3752 S  7.1  1.3   0:01.25 httpd
> > 8529 www       10   0 15308  11m 3624 S  0.0  1.3   0:01.08 httpd
> > 8531 www        9   0 15828  11m 4384 S  0.0  1.3   0:01.60 httpd
> > 8632 www        9   0 15028  11m 3836 S  0.0  1.3   0:05.05 httpd
> > 8525 www        9   0 15236  11m 3820 S  0.0  1.3   0:04.56 httpd
> > 8530 www        9   0 19804  10m 3904 S  0.0  1.2   0:02.32 httpd
> > 8523 www        9   0  108m  10m 3512 S  0.0  1.2   0:08.94 httpd
> >
> >Does anybody have somekind of explanation why apache after 5 min of work is
> eating 400 mb ram ?
> >
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> >  
> >
> 
> 
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> 


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