[hibernate-issues] [Hibernate-JIRA] Commented: (HSEARCH-327) Capability to reuse IndexWriter instances across transactions

[Sanne Grinovero (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=34358#action_34358 ] 

Sanne Grinovero commented on HSEARCH-327:
-----------------------------------------

Getting impressive results with a micro-benchmark (not very reliable):

FS, new IndexWriter per Transaction:
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 15453ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 15960ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 14787ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 38502ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 14450ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 14397ms. (100 searches, 10 insertions, 20 updates)

FS, IndexWriter shared across each Transaction:
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 1395ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 305ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 266ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 274ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 267ms. (100 searches, 10 insertions, 20 updates)
Performance test for org.hibernate.search.reader.SharingBufferReaderProvider: 173ms. (100 searches, 10 insertions, 20 updates)


> Capability to reuse IndexWriter instances across transactions
> -------------------------------------------------------------
>
>                 Key: HSEARCH-327
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-327
>             Project: Hibernate Search
>          Issue Type: Improvement
>            Reporter: Sanne Grinovero
>            Assignee: Sanne Grinovero
>             Fix For: 3.2.0
>
>
> don't close the IndexWriter but reuse it for the work on the next transaction.
> It is needed that this can be disabled for some configurations: create a new configuration parameter.

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