Sophos and PDFs again -- and speed

Ron Broersma ron at SPAWAR.NAVY.MIL
Thu Apr 8 12:27:23 IST 2004


It sounds similar to the problem I'm having with sendmail cooking large
alias db files (i.e. "newaliases").  Takes 1.5 seconds on RH 9, but
takes 30 seconds or more on Fedora and RHEL.  The problem is in libdb.a
(BerkeleyDB) library.  RH9 uses 4.0 while Fedora and RHEL use 4.1, which
has a major performance bug (which I've been unable to isolate).  I
notice this when restarting MailScanner because it restarts sendmail and
also runs "newaliases" in the startup script.

I know this is different than your Sophos issue, but I wonder if Sophos
uses BerkeleyDB for anything, or if there is some similar issue
affecting both pieces of software.

--Ron

Julian Field wrote:

> That's more like it.
> Now we need to find out why his RH9 system takes 1.9 seconds while
> other systems take 8 seconds.
> Has anyone quizzed Sophos on this?
>
> At 19:38 07/04/2004, you wrote:
>
>> Thank you for the instructions.
>> I'm running RedHat 9 on a dual 1Ghz processors and a Gig of Ram.
>> Sophos Version 3.80
>> MailScanner Version 4.28.6-1
>> Spamassassin 2.63
>> Time to start:
>> real    0m1.939s
>> user    0m1.820s
>> sys     0m0.120s
>>
>> Ryan
>>
>> Jason Balicki wrote:
>>
>>>>
>>>>I would love to run these speed tests for myself and for the
>>>>group,
>>>>although I dont know how.
>>>>Would someone be so kind as to instruct me?
>>>>
>>>>
>>>>
>>>
>>>In my case it's:
>>>
>>>#time /opt/MailScanner/lib/sophos-wrapper  /usr/local/Sophos/ -v
>>>
>>>But it depends on the location of your sophos-wrapper and your Sophos
>>>directory.
>>>
>>>Incidentaly, I'm getting:
>>>
>>>real    0m7.615s
>>>user    0m7.540s
>>>sys     0m0.070s
>>>
>>>on a RHEL box running at 2.8Ghz.
>>>
>>>--J(K)
>>>
>>>
>>>
>>>
>> ---
>> This message has been scanned for viruses and dangerous content by
>> MailScanner,
>> and is believed to be clean.
>
>
> --
> Julian Field
> www.MailScanner.info <http://www.mailscanner.info/>
> Professional Support Services at www.MailScanner.biz
> <http://www.mailscanner.biz/>
> MailScanner thanks transtec Computers for their support
> PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654

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