MailScanner performance issues

[Julian Field]

If it's not picking up full batches, that's because they haven't 
finished being delivered to your server so cannot be processed.

I would suggest that you have a lot of incoming sendmail processes and 
netstat will probably show loads of port 25/tcp connections inbound.

Someone's pummelling you with mail.

Jules.

On 11/11/2010 12:19, Zaeem Arshad wrote:
> Hi List,
>
> For the past couple of days, my normally fine MailScanner system
> started showing signs of sluggishness. At one time, the queue climbed
> up to 90,000. We did not observe any sort of spam or other attack
> during that period. Since that fateful day, I have tried upgrading the
> version from 4.77 to 4.81 but no effect. While I am still trying to
> understand why the system is working slow, I have observed that the
> queue has more than a 1000 messages but MailScanner processes are
> picking up a random number instead of the configured 50 messages. A
> log of the processes is available at http://pastebin.com/hgBu66HL. .
> For now, I have bypassed MailScanner as the queue buildup is too much
> to handle. The incoming workdir is on tmpfs and I haven't seen any
> disk or IO issues. Here is the output of MailScanner -version.
>
>
> MailScanner -version
> Running on
> Linux antivirus5.cyber.net.pk 2.6.18-128.el5 #1 SMP Wed Jan 21
> 10:41:14 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
> This is CentOS release 5.3 (Final)
> This is Perl version 5.008008 (5.8.8)
>
> This is MailScanner version 4.81.4
> Module versions are:
> 1.00    AnyDBM_File
> 1.30    Archive::Zip
> 0.23    bignum
> 1.04    Carp
> 1.41    Compress::Zlib
> 1.119   Convert::BinHex
> 0.17    Convert::TNEF
> 2.121_08        Data::Dumper
> 2.27    Date::Parse
> 1.00    DirHandle
> 1.05    Fcntl
> 2.74    File::Basename
> 2.09    File::Copy
> 2.01    FileHandle
> 1.08    File::Path
> 0.20    File::Temp
> 0.90    Filesys::Df
> 3.64    HTML::Entities
> 3.64    HTML::Parser
> 3.57    HTML::TokeParser
> 1.23    IO
> 1.14    IO::File
> 1.13    IO::Pipe
> 2.04    Mail::Header
> 1.89    Math::BigInt
> 0.22    Math::BigRat
> 3.07    MIME::Base64
> 5.427   MIME::Decoder
> 5.427   MIME::Decoder::UU
> 5.427   MIME::Head
> 5.427   MIME::Parser
> 3.07    MIME::QuotedPrint
> 5.427   MIME::Tools
> 0.13    Net::CIDR
> 1.25    Net::IP
> 0.16    OLE::Storage_Lite
> 1.04    Pod::Escapes
> 3.05    Pod::Simple
> 1.09    POSIX
> 1.19    Scalar::Util
> 1.78    Socket
> 2.16    Storable
> 1.4     Sys::Hostname::Long
> 0.27    Sys::Syslog
> 1.26    Test::Pod
> 0.86    Test::Simple
> 1.9707  Time::HiRes
> 1.02    Time::localtime
>
> Optional module versions are:
> 1.30    Archive::Tar
> 0.23    bignum
> 1.82    Business::ISBN
> 1.10    Business::ISBN::Data
> 1.08    Data::Dump
> 1.814   DB_File
> 1.25    DBD::SQLite
> 1.607   DBI
> 1.15    Digest
> 1.01    Digest::HMAC
> 2.36    Digest::MD5
> 2.11    Digest::SHA1
> 1.00    Encode::Detect
> 0.17008 Error
> 0.18    ExtUtils::CBuilder
> 2.18    ExtUtils::ParseXS
> 2.38    Getopt::Long
> 0.44    Inline
> 1.08    IO::String
> 1.04    IO::Zlib
> 2.21    IP::Country
> missing Mail::ClamAV
> 3.002005        Mail::SpamAssassin
> v2.004  Mail::SPF
> 1.999001        Mail::SPF::Query
> 0.2808  Module::Build
> 0.20    Net::CIDR::Lite
> 0.66    Net::DNS
> 0.002.2 Net::DNS::Resolver::Programmable
> missing Net::LDAP
>   4.004  NetAddr::IP
> 1.94    Parse::RecDescent
> missing SAVI
> 2.64    Test::Harness
> 0.95    Test::Manifest
> 1.98    Text::Balanced
> 1.35    URI
> 0.7203  version
> 0.62    YAML
>
>
>
> Regards
>
> Zaeem

Jules

-- 
Julian Field MEng CITP CEng
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