On Mon, Sep 14, 2009 at 12:52:15PM -0700, David Birdsong wrote: (snip snip)
> > But are you sure you're getting hits at all? > > varnistat shows hitrate around .54 for 10 and 1000 second averages. N > expired objects is anywhere between 10-40 second though and varnishd > has only been running for about 12 hours. i expect the hit rate to > drop sharply as peak traffic continues to diminish for the day. Depending on the content, that might be a very low hit-rate. > i think a 9000s obj.ttl is a complete mistake on our part. so i've > followed some of the steps found here > http://varnish.projects.linpro.no/wiki/VCLExampleLongerCaching > on 1 of our servers. i'm going to compare it in a day or so. > > why do you ask though? It's fairly common to have pages that aren't cached. If I'm going to give you a single tip right now, it's to look at the output of: varnishtop -i TxURL That's a sorted list of what urls Varnish requests from your backend (in other words: cache misses). Most items should have a 1 or less next to them. The number represents a decaying average, and you should know why if you have items there that have double-digit representation. It should also give you an indication of whether this is a problem with your TTL or a few pages that aren't cached at all, all though the pass/hitpass counter in varnishstat will tell you that too. -- Kristian Lyngstøl Redpill Linpro AS Tlf: +47 21544179 Mob: +47 99014497
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