[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Disk performance issue - CVS on AIX

From: iain . mees
Subject: Re: Disk performance issue - CVS on AIX
Date: Fri, 26 Sep 2008 10:01:59 +0100


We run a massive CVS repository here at British Airways on AIX5.3. I have 
customised it significantly and it is running in a chroot jail rather than 
native for security reasons.

Running from /tmp is not something I have ever heard of, or would 
recommend (/tmp is for temporary files, not applications). CVS is not 
really CPU bound, but can be rather i/o bound when it comes to checking a 
number of items in/out. It also tends to use /tmp frequently as a 
temporary storage area. As your repository is also in /tmp I would be 
inclined to say that your i/o is out performing your disk capability.

If I remember correctly, you can change the cvs temp area (during compile 
I think). but your most sensible thing would be to move your repository to 
a proper filesystem, preferably on a different physical disk.

With regard to SSH being slow... If you are running OpenSSH, then try 
making it running it as a daemon rather than via inetd. That way it 
doesn't need to start for every connection as its already in storage.

Hope this helps


"Bill V Vickery" <wvvicke@regence.com> 
Sent by: bug-cvs-bounces+iain.mees=ba.com@nongnu.org
26/09/2008 05:15


Disk performance issue - CVS on AIX

Anyone aware of a disk performance issue with CVS in AIX 5.2, where 
repository is located in /tmp and generating sufficient I/O load that it 
brings rootvg disks to 100%, with essentially zero throughput.  System 
becomes unresponsive taking several minutes just to open a new ssh 
session.  Any comments/advice would be appreciated.

Kindest Regards,

Bill Vickery
RITS/UNIX Team lead
Office: (801) 333-5818

To provide feedback regarding RITS service, click here: 
*IMPORTANT NOTICE: This communication, including any attachment, contains 
information that may be confidential or privileged, and is intended solely 
for the entity or individual to whom it is addressed.  If you are not the 
intended recipient, you should delete this message and are hereby notified 
that any disclosure, copying, or distribution of this message is strictly 
prohibited.  Nothing in this email, including any attachment, is intended 
to be a legally binding signature.
Bug-cvs mailing list

Get the best from British Airways at ba.com

This message is private and confidential and may also be legally privileged.  
If you have received this message in error, please email it back to the sender 
and immediately permanently delete it from your computer system.  Please do not 
read, print, re-transmit, store or act in reliance on it or any attachments.

British Airways may monitor email traffic data and also the content of emails, 
where permitted by law, for the purposes of security and staff training and in 
order to prevent or detect unauthorised use of the British Airways email system.

Virus checking of emails (including attachments) is the responsibility of the 

British Airways Plc is a public limited company registered in England and 
Wales.  Registered number: 1777777.  Registered office: Waterside, PO Box 365, 
Harmondsworth, West Drayton, Middlesex, England, UB7 0GB.

Additional terms and conditions are available on our website: www.ba.com

reply via email to

[Prev in Thread] Current Thread [Next in Thread]