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Message-ID: <03e001c10421$e8fb4de0$806410ac@local>
From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: "James Grishaw" <jgrishaw AT myrealbox DOT com>, <cygwin AT sourceware DOT cygnus DOT com>
References: <3B425A48 DOT D6A25F09 AT myrealbox DOT com>
Subject: Re: inetd: how does one change the priority?
Date: Wed, 4 Jul 2001 10:40:21 +1000
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----- Original Message -----
From: "James Grishaw" <jgrishaw AT myrealbox DOT com>
To: <cygwin AT sourceware DOT cygnus DOT com>
Sent: Wednesday, July 04, 2001 9:50 AM
Subject: inetd: how does one change the priority?


> Team,
>
>      I am having a problem with poor performance with an imapd
> daemon that I am running under Cygwin inetd.  The symptoms are as follows:
> (1)  I can connect to the imapd server from any external box (other
>      than the server) and everything works fine.
> (2)  If I run Netscape on the server, I connect fine and all the commands
>      work, but the performance is horrible (up to 30 seconds to
>      open a mailbox, with CPU usage at 100% during the wait).
> (3)  If I use task manager to decrease the priority of the Netscape
>      process or increase the priority of the imapd processes, performance
>      is good again.
> (4)  This problem only occurs on Windows 2000.  Windows NT works fine.
>
>      I am surmising that Netscape is consuming all of the CPU while it
> is waiting for a response from the starved imapd daemon.
>
>      I am running inetd as a service.  Is there a way to increase the
priority
> of the Cygwin inetd.exe process (and all of its children)?  I will accept
any clues.

nice can do it, or you could wrap the imapd in a script with nice().
Personally I suggest patching inetd to make a call to nice() so that you
won't be delayed while waiting for inted to spawn the child. You may need to
call nice in the child as well - YMMV.

Rob

>
> Many thanks,
> Jim Grishaw.
>
>
>
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