JDBC optimizations: setReadOnly, setMaxRows
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Key: SOLR-812
URL: https://issues.apache.org/jira/browse/SOLR-812
Project: Solr
Issue Type: Improvement
Components: contrib - DataImportHandler
Affects Versions: 1.3
Reporter: David Smiley
I'm looking at the DataImport code as of Solr v1.3 and using it with Postgres
and very large data sets and there some improvement suggestions I have.
1. call setReadOnly(true) on the connection. DIH doesn't change the data so
this is obvious.
2. call setAutoCommit(false) on the connection. (this is needed by Postgres
to ensure that the fetchSize hint actually works)
3. call setMaxRows(X) on the statement which is to be used when the
dataimport.jsp debugger is only grabbing X rows. fetchSize is just a hint and
alone it isn't sufficient.
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