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Hi Greg,
I use this combo to check if request is cached or no and why:
debug_options 20,9 27,9 31,9 70,9 82,9 22,9 84,9 90,9
Then in cache.log file you can search by 'YES' or 'NO' (uppercase)
to see if the content is cacheable (and cached) or not and the
reason of this decision. Hope this will help.
Best wishes,
Pavel
On 02/24/2015 03:54 PM, Greg wrote:
Hi all,
I'm new to
squid administration, with basic *nix admin skills. My task
now is to replace an old Squid reverse proxy server (3.1.15 on
an old Fedora) with a new one (Squid 3.3.8 on Ubuntu 14 LTS)
and ran into a problem.
I've spent 2
days tweaking-googling-debugging, now looking for some help...
Problem is,
with the ~same configuration, the old Squid caches HTML pages
well and the new doesn't. This is a major concern, we're using
Squid exactly to do that and get the load off our appservers.
In this first
mail, I'm only asking for a hint on what debug_options to use.
In previous list emails I've seen that some details help, so
here they are:
- Reverse
proxy, port 80 only, one uplink straight to the app servers.
- Pretty
standard configuration, standard refresh_patterns.
- Disk and
memory cache, disk cache initialised with -z.
- Clocks are in
sync (except for the old proxy server) using ntpd.
- Squid gives HITs for
favicon.ico and RSS feeds only - these have different
headers and mimetypes compared to HTML files (and
that's by design).
- This new server seems to save accessed HTML files on
disk but still gives X-Cache-Lookup:MISS for all of them
later.
- I've found the debug_options
sections page but section names are ambiguous for someone
who's not a Squid programmer. I had to download the source
code, analysed it and tried "debug_options 11,1 22,6 85,3
88,5 33,1 31,5 90,5" which is too much and "debug_options
88,5 85,5 22,6 11,5 33,1" which might be too little.
- Headers look okay
(Cache-Control, Pragma, Vary), stale/fresh calculation
looks okay (pages are deemed fresh) in the debug log.
- The best I got so far is
this: "client_side_reply.cc(1618) identifyFoundObject:
clientProcessRequest2: StoreEntry is NULL - MISS",
even for pages I see in the disk cache -- I'd like to
know why does it occur, probably need some more good
debug_options. I don't understand the code too well,
don't know which direction to take.
Please suggest some more good debug_options to
continue with.
Best regards,
Greg
PS. Also, I'll submit another mail
with the details of the problem + the config, hoping someone
spots a problem right away.
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