----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/72392/#review220401 -----------------------------------------------------------
Ship it! Ship It! - Marton Bod On April 21, 2020, 12:41 p.m., Peter Vary wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/72392/ > ----------------------------------------------------------- > > (Updated April 21, 2020, 12:41 p.m.) > > > Review request for hive, Denys Kuzmenko and Marton Bod. > > > Bugs: HIVE-23103 > https://issues.apache.org/jira/browse/HIVE-23103 > > > Repository: hive-git > > > Description > ------- > > Examine how to really get better performance for oracle statement batches. > > Oracle JDBC doc describes: > > The Oracle implementation of standard update batching does not implement true > batching for generic statements and callable statements. Even though Oracle > JDBC supports the use of standard batching for Statement and > CallableStatement objects, you are unlikely to see performance improvement. > > I would look for connection properties to set, so it is handled anyway, or if > not, then use: > > begin > query1; > query2; > query3; > end; > to we will have only a single roundtrip for the db. > > > Diffs > ----- > > > standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnDbUtil.java > bb29410e7d > > standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/TxnHandler.java > d080df417b > > > Diff: https://reviews.apache.org/r/72392/diff/2/ > > > Testing > ------- > > Baseline: > Benchmark (dbProduct) (txnType) Mode Cnt Score > Error Units > TxnHandlerBenchRunner.commitTxn ORACLE DEFAULT ss 100 42.988 ± > 4.569 ms/op > TxnHandlerBenchRunner.commitTxn ORACLE READ_ONLY ss 100 45.029 ± > 4.686 ms/op > > After patch: > Benchmark (dbProduct) (txnType) Mode Cnt Score > Error Units > TxnHandlerBenchRunner.commitTxn ORACLE DEFAULT ss 100 36.208 ± > 3.869 ms/op > TxnHandlerBenchRunner.commitTxn ORACLE READ_ONLY ss 100 37.038 ± > 3.746 ms/op > > > Thanks, > > Peter Vary > >
