Mailing List Message #93112
From: Andy Kunkle <>
Subject: RE: Slow outlook sometimes
Date: Tue, 06 Nov 2007 14:04:19 -0500
To: CommuniGate Pro Discussions <>
X-Mailer: CommuniGate Pro MAPI Connector 1.2.6/1.2.12

I have just about the same setup and I’m working through tweaking my server now. The one thing I can suggest is changing the number of Channels for IMAP to a number greater than the number of accounts you have. With 8GB of RAM your machine shouldn’t have a problem with this. It was set to 50 (meaning 50 listeners at a time) by default which was denying access to some users, and causing them to go offline and just generally causing havoc on the system.


You can find that setting under Settings > Domain > Access > IMAP >  Channels


I set mine to 300.


The other thing to look at is whether you are scanning incoming messages for SPAM or viruses. These programs are hogs and depending on the number of messages you get in an hour, they could be slowing things down as well. I suggest upping the Enqueuer and Dequeuer numbers to at least 25 (mine is set to 50). This allows the server to process more messages at a time. I also turned down the importance in the file system for cgpav and cgpsa by typing the following into a shell window:


ionice -c 2 `pidof spamd clamd`


The other question I have is what type of hard drives are you using? Are they SAS, SCSI, SATA? You can install sar (sysstat) and it will tell you I/O information on your file system to see if you’re hitting some maximum limits of the system.


Good luck.


Andy Kunkle

IT Administrator

AIM Engineering & Surveying, Inc.

5300 Lee Blvd

Lehigh Acres, FL 33971



From: CommuniGate Pro Discussions [] On Behalf Of Massimo Bolzoni
Sent: Tuesday, November 06, 2007 11:52 AM
To: CommuniGate Pro Discussions
Subject: Re: Slow outlook sometimes



Il giorno 06/nov/07, alle ore 17:30, Martin.Hepworth ha scritto:




Hi Martin,

We got a 5.1.12 64 bit linux with a raid 5 (8 disks) for the /var/Communigate area, based in the UK. Quad core Xeon and 8GB rAM. maildir for all accounts (over 160 users and potentially lots of emails per user in come cases, not very many in others).


Several users (about 12) esp in the NY office report the following issueson Outlook2003..(connected via MPLS WAN. some running on port 143 and some on 993)


Slow opening/loading of Outlook program/messages

Excessive time to send small messages

Frequent lock ups of Outlook requiring Outlook quit/restart

Slow access to Outlook folders


also effects local users when out and about esp in far flung places like Hong Kong.


some are running 1.2.5 of the mapi and some newer versions up to 1.2.12.


The client side NEED to be the one released for the server one. So Before anithing else patch the client to the last one available for the 5.1.12


The number of messages in inbox could affect the speed at the OL startup but should no interfer afterward.






All users download the full message body and checks are made on all folders for new messages.


network utilisation on the WAN shows lots of free bandwidth.


I've done some TCP/IP tuning on the server and the client and this seems to have help a little, but does any one have a methodology I can use to try and overcome these issues in order to get better performance?.



Martin Hepworth

Snr Sys Admin

Solid State Logic



Confidentiality : This e-mail and any attachments are intended for the addressee only and may be confidential. If they come to you in error you must take no action based on them, nor must you copy or show them to anyone. Please advise the sender by replying to this e-mail immediately and then delete the original from your computer.

Opinion : Any opinions expressed in this e-mail are entirely those of the author and unless specifically stated to the contrary, are not necessarily those of the author's employer.

Security Warning : Internet e-mail is not necessarily a secure communications medium and can be subject to data corruption. We advise that you consider this fact when e-mailing us. Viruses : We have taken steps to ensure that this e-mail and any attachments are free from known viruses but in keeping with good computing practice, you should ensure that they are virus free.


Red Lion 49 Ltd T/A Solid State Logic

Registered as a limited company in England and Wales (Company No:5362730)

Registered Office: 25 Spring Hill Road, Begbroke, Oxford OX5 1RU, United Kingdom





This message is sent to you because you are subscribed to

 the mailing list <>.

To unsubscribe, E-mail to: <>

To switch to the DIGEST mode, E-mail to <>

To switch to the INDEX mode, E-mail to <>

Send administrative queries to  <>


Massimo Bolzoni - Solution Architect


Polyserve Inc. - Matrix Server -

CommuniGate System GMBH - CommuniGatePro -

Sede Legale: Via Rosario Livatino 9 - 42100 - Reggio Emilia (RE)

Sede Operativa: Via M.K. Gandhi 22 - 42100 - Reggio Emilia (RE)

Tel: +39 0522 286545

Fax: +39 0522 286233

Cel: +39 335 5278936


Le informazioni contenute nella presente comunicazione e i relativi

allegati possono essere riservate e sono, comunque, rivolte esclusi-

vamente al destinatario. La diffusione, distribuzione e/o copie del

documento trasmesso o degli allegati da parte di qualsiasi soggetto

diverso dal destinatario e'perseguibile ai sensi dell'articolo 616

Codice Penale e del Decreto Legislativo n. 196/2003.

Se avete ricevuto questo messaggio per errore, Vi preghiamo di re-

inviarlo al mittente e distruggerlo.

Per informazioni potete contattare l'indirizzo


This message and its attachments are addressed solely to the persons

above and may contain confidential information. If you have received

the message in error, be informed that any use of the content hereof

is prohibited and it is punished by law. Please return it immediately

to the sender and delete the message. Should you have any questions,

please contact us at





Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster