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Michael Busch commented on LUCENE-2312: --------------------------------------- {quote} A quick and easy way to solve this is to use a read write lock on the byte pool? {quote} If you use a RW lock then the writer thread will block all reader threads while it's making changes. The writer thread will be making changes all the time in a real-time search environment. The contention will kill performance I'm sure. RW lock is only faster than mutual exclusion lock if writes are infrequent, as mentioned in the javadocs of ReadWriteLock.java > Search on IndexWriter's RAM Buffer > ---------------------------------- > > Key: LUCENE-2312 > URL: https://issues.apache.org/jira/browse/LUCENE-2312 > Project: Lucene - Java > Issue Type: New Feature > Components: Search > Affects Versions: 3.0.1 > Reporter: Jason Rutherglen > Assignee: Michael Busch > Fix For: 3.1 > > > In order to offer user's near realtime search, without incurring > an indexing performance penalty, we can implement search on > IndexWriter's RAM buffer. This is the buffer that is filled in > RAM as documents are indexed. Currently the RAM buffer is > flushed to the underlying directory (usually disk) before being > made searchable. > Todays Lucene based NRT systems must incur the cost of merging > segments, which can slow indexing. > Michael Busch has good suggestions regarding how to handle deletes using max > doc ids. > https://issues.apache.org/jira/browse/LUCENE-2293?focusedCommentId=12841923&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12841923 > The area that isn't fully fleshed out is the terms dictionary, > which needs to be sorted prior to queries executing. Currently > IW implements a specialized hash table. Michael B has a > suggestion here: > https://issues.apache.org/jira/browse/LUCENE-2293?focusedCommentId=12841915&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12841915 -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org For additional commands, e-mail: java-dev-h...@lucene.apache.org