Tangentially related, possibly of interest regarding solr-internal cache hit ratio (esp. with a lot of replicas): https://issues.apache.org/jira/browse/SOLR-13257
On Mon, Feb 25, 2019 at 11:33 AM Walter Underwood <wun...@wunderwood.org> wrote: > Don’t worry about one and two character queries, because they will almost > always be served from cache. > > There are only 26 one-letter queries (36 if you use numbers). Almost all > of those will be in the query results cache and will be very fast with very > little server load. The common two-letter queries will also be cached. > > An external HTTP cache can be effective, especially if you have a lot of > replicas. The single cache will have a higher hit rate than the individual > servers. > > wunder > Walter Underwood > wun...@wunderwood.org > http://observer.wunderwood.org/ (my blog) > > > On Feb 25, 2019, at 7:57 AM, Edward Ribeiro <edward.ribe...@gmail.com> > wrote: > > > > Maybe you could add a length filter factory to filter out queries with 2 > or > > 3 characters using > > > https://lucene.apache.org/solr/guide/7_4/filter-descriptions.html#FilterDescriptions-LengthFilter > > ? > > > > PS: this filter requires a max length too. > > > > Edward > > > > Em qui, 21 de fev de 2019 04:52, Furkan KAMACI <furkankam...@gmail.com> > > escreveu: > > > >> Hi Joakim, > >> > >> I suggest you to read these resources: > >> > >> http://lucene.472066.n3.nabble.com/Varnish-td4072057.html > >> http://lucene.472066.n3.nabble.com/SolrJ-HTTP-caching-td490063.html > >> https://wiki.apache.org/solr/SolrAndHTTPCaches > >> > >> which gives information about HTTP Caching including Varnish Cache, > >> Last-Modified, ETag, Expires, Cache-Control headers. > >> > >> Kind Regards, > >> Furkan KAMACI > >> > >> On Wed, Feb 20, 2019 at 11:18 PM Joakim Hansson < > >> joakim.hansso...@gmail.com> > >> wrote: > >> > >>> 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! > >>> > >> > >
