How many CPUs on that machine? How many other requests using the server?
On Thu, Sep 17, 2015, at 09:58 AM, Zheng Lin Edwin Yeo wrote: > Thanks for the information. > > I was trying with 2 shards and 4 shards but all on the same machine, and > they have the same performance (no improvement in performance) as the one > with 1 shard. My machine has a 32GB RAM. > > Probably I should try one of the shard in different machine and see how > it > goes? > > Regards, > Edwin > > > On 17 September 2015 at 15:37, Toke Eskildsen <t...@statsbiblioteket.dk> > wrote: > > > On Thu, 2015-09-17 at 12:04 +0530, Shalin Shekhar Mangar wrote: > > > Yes, of course, the only reason to have more shards is so that they > > > can reside on different machines (or use different disks, assuming you > > > have enough CPU/memory etc) so that you can scale your indexing > > > throughput. > > > > For indexing, true. Due to Solr's 1-request-1-thread nature, sharding on > > the same hardware can be used to lower latency for CPU-heavy searches. > > > > We are running 25 shards/machine, where the machines has 16HT CPU-cores. > > Granted we also do it due to the pesky 2 billion limit, but the result > > is that the CPU-cores are nicely utilized with our low queries/second > > usage pattern. > > > > - Toke Eskildsen, State and University Library, Denmark > > > > > >
