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From Furkan KAMACI <>
Subject Re: Is anyone using proxy caching in front of solr?
Date Thu, 21 Feb 2019 07:52:39 GMT
Hi Joakim,

I suggest you to read these resources:

which gives information about HTTP Caching including Varnish Cache,
Last-Modified, ETag, Expires, Cache-Control headers.

Kind Regards,

On Wed, Feb 20, 2019 at 11:18 PM Joakim Hansson <>

> Hello dear user list!
> I work at a company in retail where we use solr to perform searches as you
> type.
> As soon as you type more than 1 characters in the search field solr starts
> serving hits.
> Of course this generates a lot of "unnecessary" queries (in the sense that
> they are never shown to the user) which is why I started thinking about
> using something like squid or varnish to cache a bunch of these 2-4
> character queries.
> It seems most stuff I find about it is from pretty old sources, but as far
> as I know solrcloud doesn't have distributed cache support.
> Our indexes aren't updated that frequently, about 4 - 6 times a day. We
> don't use a lot of shards and replicas (biggest index is split to 3 shards
> with 2 replicas). All shards/replicas are not on the same solr host.
> Our solr setup handles around 80-200 queries per second during the day with
> peaks at >1500 before holiday season and sales.
> I haven't really read up on the details yet but it seems like I could use
> etags and Expires headers to work around having to do some of that
> "unnecessary" work.
> Is anyone doing this? Why? Why not?
> - peace!

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