Re: dbmail-lmtpd memory usage

James Greig wrote:
> Hi Guys,
>  
> I'm not sure if this is a cause for concern or not. 
Our dbmail-lmtpd
> memory usage just seems to be creeping up and up to the
extent that our
> boxes are running out of memory.  It's a fairly heavily
used mail
> cluster, so i'm torn between it just out growing its
hardware or whether
> there's a possible memory leak in dbmail-lmtpd??
>  
> One of our boxes running dbmail-lmtpd has died two or
three times in the
> past few months and it appears to have been down to
memory usage. 
> dbmail-lmtpd seems to always be on top, right now each
process of
> dbmail-lmtpd is using approximately 40m-50m RES
(Resident) memory,
> however, at times when the machine has exhausted
memory, lmtpd has been
> using up to 130m RES per process, is this normal??
>  
> P.S we're running 2.2.7

James, not normal at all. Someone else reported possible
leakage in the
lmtp daemon as well, so it's a definite suspect.

Until someone tracks this down consider lowering the
maxconnects setting
in dbmail.conf for lmtp. If necessary lower it to 1.

-- 
 
____________________________________________________________
____
  Paul Stevens                                      paul at
nfg.nl
  NET FACILITIES GROUP                     GPG/PGP:
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Paul J Stevens wrote:
> James Greig wrote:
>> Hi Guys,
>>  
>> I'm not sure if this is a cause for concern or not.
 Our dbmail-lmtpd
>> memory usage just seems to be creeping up and up to
the extent that our
>> boxes are running out of memory.  It's a fairly
heavily used mail
>> cluster, so i'm torn between it just out growing
its hardware or whether
>> there's a possible memory leak in dbmail-lmtpd??
>>  
>> One of our boxes running dbmail-lmtpd has died two
or three times in the
>> past few months and it appears to have been down to
memory usage. 
>> dbmail-lmtpd seems to always be on top, right now
each process of
>> dbmail-lmtpd is using approximately 40m-50m RES
(Resident) memory,
>> however, at times when the machine has exhausted
memory, lmtpd has been
>> using up to 130m RES per process, is this normal??
>>  
>> P.S we're running 2.2.7
> 
> James, not normal at all. Someone else reported
possible leakage in the
> lmtp daemon as well, so it's a definite suspect.
> 
> Until someone tracks this down consider lowering the
maxconnects setting
> in dbmail.conf for lmtp. If necessary lower it to 1.
> 
Paul
could this be an issue? (in the 2.2.9 codebase)

misc.c: 2336 dbmail_iconv_decode_field can get a non-null
pointer
returned from dbmail_iconv_str_to_utf8 and stored into
tmp_raw, which is
not freed before tmp_raw is destroyed.

John
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