DragonFly BSD
DragonFly bugs List (threaded) for 2006-03
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Re: (cache_lock diagnostics)

From: Sven Willenberger <sven@xxxxxxx>
Date: Tue, 21 Mar 2006 17:07:01 -0500

On Tue, 2006-03-21 at 10:08 -0800, Matthew Dillon wrote:
> :This is a DFly 1.4.0 system (DragonFly 1.4.0-RELEASE (myhost) #3: Thu
> :Jan 19 08:33:37 EST 2006) that is being used primarily as a spam
> :filtering machine and, as such, sees some pretty high volume. About a
> :week ago I started getting the following type of messages appearing in
> :my logs and am wondering about a) the nature of the severity these
> :represent b) the underlying cause and c) how to diagnose further.
> :
> :As a side note, this machine was upgraded from a 1.0 system and the
> :ports replaced/upgraded using pkgsrc.
>     As long as the machine doesn't deadlock in the name resolution code,
>     the messages are harmless.  The messages are printed when the filename
>     resolver blocks for more then one second and will occur more often on
>     busy systems.
>     I should probably change the default timeout.  You can adjust the
>     default timeout with the debug.nclockwarn sysctl.  This value is in
>     ticks so 100 = 1 second.  Try 500 (5 seconds).  The sysctl only effects
>     the reporting of the warning.
> 						-Matt

Sounds good, I will use the sysctl then to keep the chatter down :-) As
far as I can tell, the box still performs as usual and I haven't seen
any specific performance issues resulting from this.



p.s. Sorry about the lack of subject line; when I originally posted this
I pasted the errors into the body and forgot to go back and add a
subject line.

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