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From "Mario Passaggio" <mario...@tin.it>
Subject Re: [users@httpd] "Out of memory" logging format
Date Sat, 27 Aug 2005 12:11:47 GMT
do you use NFS?
Search nfs between the apache bugs
This could happen I guess even on local file sistem
when the httpd process tries to read a file: it stats the file for its size
meanwhile if the sought file has been substituted with a new smaller one
it will try to read (and so allocating memory) the last part of the file 
that can't find
because of substitution.
Could this scenario be your own?
bye
----- Original Message ----- 
From: "Udo Rader" <udo.rader@bestsolution.at>
To: <users@httpd.apache.org>
Sent: Friday, August 26, 2005 4:59 PM
Subject: Re: [users@httpd] "Out of memory" logging format


> On Fri, 2005-08-26 at 10:20 -0400, Joshua Slive wrote:
>> On 8/26/05, Udo Rader <udo.rader@bestsolution.at> wrote:
>> > Yet of course I would like to know the exact time and circumstances 
>> > when
>> > such a situtation occurs. When reaching the memory limit, apache
>> > produces log entries like this:
>> >
>> > -----------CUT-----------
>> > [...]
>> > ^GOut of memory (Needed 8164 bytes)
>> > ^GOut of memory (Needed 8164 bytes)
>> > ^GOut of memory (Needed 8164 bytes)
>> > ^GOut of memory (Needed 8164 bytes)
>> > ^GOut of memory (Needed 8164 bytes)
>> > FATAL:  erealloc():  Unable to allocate 76 bytes
>> > -----------CUT-----------
>> >
>> > Now what I would like to have is a more informative logging message,
>> > such as which URL caused the error.
>> >
>> > Is that possible?
>>
>> In general, no.  Apache considers out of memory to be an unrecoverable
>> error, and therefore doesn't try to protect against it in many
>> different code paths.
>>
>> On the other hand, there is a new module called mod_log_forensice
>> included with apache that may help.  It can be used to find requests
>> that were received but where no response was sent.  These would
>> probably match up with your out-of-memory crashes.
>>
>> Joshua.
>
> thanks, this looks very promising.
>
> Udo Rader
>
> -- 
> bestsolution.at EDV Systemhaus GmbH
> http://www.bestsolution.at
>
>
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