Thanks for your answer. 2013/4/10 Walter Underwood <wun...@wunderwood.org>
> We are using Amazon EC2 M1 Extra Large instances (m1.xlarge). > > http://aws.amazon.com/ec2/instance-types/ > > wunder > > On Apr 9, 2013, at 3:35 PM, Furkan KAMACI wrote: > > > Hi Walter; > > > > Firstly thank for your detailed reply. I know that this is not a well > > detailed question but I don't have any metrics yet. If we talk about your > > system, what is the average RAM size of your Solr machines? Maybe that > can > > help me to make a comparison. > > > > 2013/4/10 Walter Underwood <wun...@wunderwood.org> > > > >> On Apr 9, 2013, at 3:06 PM, Furkan KAMACI wrote: > >> > >>> Are there anybody who can help me about how to guess the approximately > >>> needed RAM for 5000 query/second at a Solr machine? > >> > >> No. > >> > >> That depends on the kind of queries you have, the size and content of > the > >> index, the required response time, how frequently the index is updated, > and > >> many more factors. So anyone who can guess that is wrong. > >> > >> You can only find that out by running your own benchmarks with your own > >> queries against your own index. > >> > >> In our system, we can meet our response time requirements at a rate of > >> 4000 queries/minute. We have several cores, but most traffic goes to a > 3M > >> document index. This index is small documents, mostly titles and > authors of > >> books. We have no wildcard queries and less than 5% of our queries use > >> fuzzy matching. We update once per day and have cache hit rates of > around > >> 30%. > >> > >> We run new benchmarks twice each year, before our busy seasons. We use > the > >> current index and configuration and the queries from the busiest day of > the > >> previous season. > >> > >> Our key benchmark is the 95th percentile response time, but we also > >> measure median, 90th, and 99th percentile. > >> > >> We are currently on Solr 3.3 with some customizations. We're working on > >> transitioning to Solr 4. > >> > >> wunder > >> -- > >> Walter Underwood > >> wun...@wunderwood.org > >> > >> > >> > >> > > -- > Walter Underwood > wun...@wunderwood.org > > > >
