Hi all, I have a scenario here and I'd love some advice on what my options are. We have one Solr master and two read replicas. The replicas query the master every 10 seconds because we need relatively quick availability of new documents. We balance read queries across all three servers and send writes only to the master.
The problem that I'm seeing is that average query time is vastly higher on the replicas than on the master - 150ms vs 1600ms. What I've noticed is that immediately after a replication, a query against the replica can take up to 5 seconds. Then subsequent queries are faster until the next replication. On one level this makes sense, since when there's a change to the index I imagine that the caches get flushed. But this is really bogging down performance on a pretty high number of queries. We should have plenty of OS disk cache - the server has 12 GB of RAM, and the apps on the server are only using up about 6. Our index is 2.7 GB, so it should fit in the OS disk cache. Are there any other factors that I can look at to eliminate these slow queries? Thanks, Scott Scott Rankin Corporate Reimbursement Services, Inc. Phone: 617-467-1931 Email: [email protected]<mailto:[email protected]> This email message contains information that Corporate Reimbursement Services, Inc. considers confidential and/or proprietary, or may later designate as confidential and proprietary. It is intended only for use of the individual or entity named above and should not be forwarded to any other persons or entities without the express consent of Corporate Reimbursement Services, Inc., nor should it be used for any purpose other than in the course of any potential or actual business relationship with Corporate Reimbursement Services, Inc. If the reader of this message is not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify sender immediately and destroy the original message. Internal Revenue Service regulations require that certain types of written advice include a disclaimer. To the extent the preceding message contains advice relating to a Federal tax issue, unless expressly stated otherwise the advice is not intended or written to be used, and it cannot be used by the recipient or any other taxpayer, for the purpose of avoiding Federal tax penalties, and was not written to support the promotion or marketing of any transaction or matter discussed herein.
