References, sorry: [1] https://support.microsoft.com/en-ca/help/976618/you-experience-performance-issues-in-applications-and-services-when-th [2] https://docs.microsoft.com/en-us/sysinternals/downloads/rammap
-----Ursprüngliche Nachricht----- Von: Dodd, Paul Sutton (UB) Gesendet: Dienstag, 29. Januar 2019 13:31 An: 'solr-user@lucene.apache.org' <solr-user@lucene.apache.org> Betreff: AW: Indexing in one collection affect index in another collection Hi If the reason for the difference in speed is that the index is being read from disk, I would expect that the first query would be slow, but subsequent queries on the same collection should speed up. A query on the other collection could then be slower. In this case I would say that this is normal behavior. The OS file cache cannot be relied upon to give the same results in different circumstances, including different software versions. You may wish to install the RamMap tool[1], [2], although you may be having the inverse problem to that described in [1]. You can then see how much space is used by the cache and other demands. If subsequent queries are fast, then to me it does not seem like a problem for a development machine. For production you may wish to store the indices in ram and/or change from windows to linux, id it is important that all queries including the first are very fast. Have a nice day Paul -----Ursprüngliche Nachricht----- Von: Shawn Heisey <apa...@elyograg.org> Gesendet: Dienstag, 29. Januar 2019 13:25 An: solr-user@lucene.apache.org Betreff: Re: Indexing in one collection affect index in another collection On 1/29/2019 5:06 AM, Zheng Lin Edwin Yeo wrote: > My guess is after we change our searchFields_tcs schema which is: > > *From*: > <dynamicField name="*_tcs" type="text_chinese" indexed="true" > stored="true" multiValued="true" termVectors="true" termPositions="true" > termOffsets="true"/> > > *To:* > <dynamicField name="*_tcs" type="text_chinese" indexed="true" > stored="true" multiValued="true" storeOffsetsWithPositions="true" > termVectors="true" termPositions="false" termOffsets="false"/> Adding termVectors will make the index bigger. Potentially much bigger. This will increase the overall RAM requirement of the server, especially if the server is handling software other than Solr. Anything that makes the index bigger can affect performance. > The above change was done in order to use the Solr recommended unified > highlighter (Posting with light term vectors) with Solr's > documentation claimed it is the fastest. > > My best guess is Solr 7.5.0 has some bugs that slowed down the whole > index and queries with the new approach (above new dynamicField > schema), which it affects the index OS filecaching or any other issues. > > So I kindly suggest you look deeper and see whether such bugs are exists? I know almost nothing about highlighting. I wouldn't be able to look for bugs. Thanks, Shawn
