Re: Failure Ratio : Going into hit-only-mode?

On Mon, Aug 03, 1998 at 10:30:39AM +0100, Nick O'Brien wrote:

> I'm getting the following messages in my cache.log file. There don't
> appears be any problems with Squid itself (the rest of cache.log only
> indicate non-critical errors).
>
> Obviously I don't want Squid going into hit only mode suddenly like this.
> I'm running Squid v1.1.22 on Digital Unix 4.0D. I couldn't find anything
> in the FAQ.

Section 12.13 in the FAQ mentions "Going into hit-only-mode":

    http://squid.nlanr.net/Squid/FAQ/FAQ-12.html#ss12.13

> Could someone tell me if this indicates a more serious problem or if there
> is any way I can prevent this, thanks.
>
> 1998/07/31 18:36:46| Failure Ratio at 1.01
> 1998/07/31 18:36:46| Going into hit-only-mode for 5 minutes...

Check your access.log for repeated queries to sites that are down or
have other trouble (ERR_*). The warning could mean you have connectivity
problems; it could also be caused by a single unreachable site if the
cache isn't very busy.

[snip]

> 1998/07/31 19:13:18| Failure Ratio at 236.86
> 1998/07/31 19:13:18| Going into hit-only-mode for 5 minutes...

Yikes -- never seen one that high :-) Are there numerous sites
with ERR_* in access.log, or just a few?

-- 
Michael Fuhr
http://www.fuhr.net/~mfuhr/