Re: [squid-users] "This cache is currently building its digest."

On 04/11/10 13:12, david robertson wrote:
> Hello, I'm having a cache-digest related issue that I'm hoping someone
> here can help me with.
>
> I've got a few frontend servers, which talk to a handful of backend
> servers. Everything is working swimmingly, with the exception of
> cache digests.
>
> The digests used to work without issue, but suddenly all of my backend
> servers have stopped building their digests. They all say "This cache
> is currently building its digest." when you try to access the digest.
> It's as if the digest rebuild never finishes. Nothing has changed
> with my configuration, and all of the backends (6 of them) have
> started doing this at roughly the same time.
>
> My first thought would be cache corruption, but I've reset all of the
> caches, and the issue still persists.
>
> Any ideas?

Possibly negative_ttl making Squid cache the digest error.

Possibly due to the digest generation period being synchronized with the
re-fetch period.

What is your digest rebuild time set to?
  your cache_dir and cache_mem sizes?
  and your negative_ttl setting?

What do you get back when making a manual digest fetch from one of the
Squid?
  squidclient -h $squid-visible_hostname
mgr:squid-internal-periodic/store_digest

"debug_options 71,9" may shed more light on what the digest rebuild is
doing.

>
> Squid Cache: Version 2.7.STABLE9
> configure options: '--prefix=/squid2' '--enable-async-io'
> '--enable-icmp' '--enable-useragent-log' '--enable-snmp'
> '--enable-cache-digests' '--enable-follow-x-forwarded-for'
> '--enable-storeio=null,aufs' '--enable-removal-policies=heap,lru'
> '--with-maxfd=16384' '--enable-poll' '--disable-ident-lookups'
> '--enable-truncate' '--with-pthreads' 'CFLAGS=-DNUMS=60 -march=nocona
> -O3 -pipe -fomit-frame-pointer -funroll-loops -ffast-math
> -fno-exceptions'

Amos

-- 
Please be using
   Current Stable Squid 2.7.STABLE9 or 3.1.9
   Beta testers wanted for 3.2.0.2