Re: [h2] MVMap similar to LinkedHashMap
No -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to h2-database+unsubscr...@googlegroups.com. To post to this group, send email to h2-database@googlegroups.com. Visit this group at https://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
[h2] MVMap similar to LinkedHashMap
Hi, Is it possible to turn of the sorting feature in MVMap and follow the insertion order? Thanks Ivan -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to h2-database+unsubscr...@googlegroups.com. To post to this group, send email to h2-database@googlegroups.com. Visit this group at https://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
Re: [h2] Version 1.4.197 is much slower then previous versions like 1.4.196
If you can generate a standalone test case, we can profile it -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to h2-database+unsubscr...@googlegroups.com. To post to this group, send email to h2-database@googlegroups.com. Visit this group at https://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
Re: [h2] Very slow execution times for SELECT-statements with lots of LEFT OUTER JOINs after updating on H2 version 1.4
EXPLAIN ANALYZE will show you what plan the db is executing, something in the planner is generating a worse plan now. Your best bet is to generate a standalone test case for us to look at. -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to h2-database+unsubscr...@googlegroups.com. To post to this group, send email to h2-database@googlegroups.com. Visit this group at https://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
[h2] Version 1.4.197 is much slower then previous versions like 1.4.196
Hi, i've upgraded from Version 1.3.167 to 1.4.197 with Backup and Restore. After Upgrading i inserted a large number of Rows (> 10). That took more then one minute while the same thing in the old Version needs only a few seconds. I checked against Version 1.4.194 and 1.4.196 (Each time upgrading from 1.3.167) and both Versions where as fast as the old 1.3.167. So it seems, the Performance Issue was introduced in Version 1.4.197. I use the following connection url: jdbc:h2:./h2/h2;LOG=2;AUTO_SERVER=TRUE;MVCC=true;WRITE_DELAY=100 Any Reason for that? Martin -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to h2-database+unsubscr...@googlegroups.com. To post to this group, send email to h2-database@googlegroups.com. Visit this group at https://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
[h2] Very slow execution times for SELECT-statements with lots of LEFT OUTER JOINs after updating on H2 version 1.4
Hello folks, in our firm we are using H2 for our test suite to perform various of integration tests for our applications. Recently, we updated to H2 1.4.196; until the day of the update, we used an older version of H2 1.3.166. We found out that the execution times of some test cases became too large after the update. After a thorough investigation we could identify that the performance drop is due to the execution of SELECT-queries with a huge number of 'LEFT OUTER JOIN's. The execution of such statements became 5-6 times slower. Consequently, we tested, for example, those statements on different H2 versions and found out that, for example, there is no performance drop on any of the 1.3 versions, but on the latest 1.4 versions (even 1.4.197) the performance issue is existent. Here is one example of the statements that we've tested: SELECT * FROM TableLT LT JOIN TableP P ON P.pId = LT.pId JOIN TableMP MP ON MP.mpId = P.mpId JOIN TableA A ON MP.aId = A.aId JOIN TableD D ON MP.dId = D.dId JOIN TableRV RV ON RV.lId = LT.lId JOIN TableCALCP CALCP ON CALCP.coId = RV.cpId LEFT OUTER JOIN TableAGGTYPET AGGTYPET ON AGGTYPET.atId = RV.atId LEFT OUTER JOIN TableDEBUGI DEBUGI ON DEBUGI.rvId = RV.rvId LEFT OUTER JOIN TablePST PST ON PST.sId = DEBUGI.psId LEFT OUTER JOIN TablePCT PCT ON PCT.pcId = DEBUGI.pcId LEFT OUTER JOIN TableDIVRT DIVRT ON DIVRT.vrId = DEBUGI.vrId LEFT OUTER JOIN TableDIVPT DIVPT ON DIVPT.vpId = DEBUGI.vpId LEFT OUTER JOIN TableDISPST DISPST ON DISPST.sId = DEBUGI.spsId LEFT OUTER JOIN TableDIVCT DIVCT ON DIVCT.vcId = DEBUGI.vcId LEFT OUTER JOIN TableDIIT DIIT ON DIIT.viId = DEBUGI.iId LEFT OUTER JOIN TableDIUSERS DIUSERS ON DIUSERS.uId = DEBUGI.uId LEFT OUTER JOIN TableCPFO CPFO ON CPFO.cpId = RV.cpId LEFT OUTER JOIN TableFTS FTS ON FTS.tsId = CPFO.tsId LEFT OUTER JOIN TableFTST FTST ON FTST.tsId = FTS.tsId LEFT OUTER JOIN TableCPBO CPBO ON CPBO.cpId = RV.cpId Does anybody know why there is such a sudden performance drop for such SQL statements on H2 v1.4 and is there a fix for it? We tried, for example, to execute the statements with different DB options (such as setting ANALYZE_AUTO to 0, etc.) but we haven't observed any visible improvement in the execution times. Further, we relaced all 'LEFT OUTER JOIN' with 'INNER JOIN' and observed that the execution times improved. However, comparing the execution times of the modified SQL statements in 1.4 and 1.3, we also observed some performance drops in 1.4 even for those statements. I would appreciate any help or suggestion. Cheers Ivaylo -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to h2-database+unsubscr...@googlegroups.com. To post to this group, send email to h2-database@googlegroups.com. Visit this group at https://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
