RDBPROD: JDBC for Rdb 184.108.40.206 and Rdb Data Provider For .Net 220.127.116.11 Query Performance Bug
Last updated on JULY 05, 2017
Applies to:Oracle Rdb Developer Tools for Visual Studio - Version 18.104.22.168 to 22.214.171.124 [Release 7.3]
Oracle JDBC for Rdb - Version 126.96.36.199 to 188.8.131.52 [Release 7.3]
Information in this document applies to any platform.
JDBC for Rdb V184.108.40.206.
A specific query consumes a lot of CPU, causes a lot of stalls, and sometimes stops the JDBC for Rdb thinserver process.
From the JDBC trace file:
Lost connection to executor RDBJDBC00139C61_00000003 SQSNRH100000003 >> status = 0x056EE024 SQLstate = 08006" )
The issue is specific to a table with a large number of columns (249 in one case), but more importantly a high number of metadata field versions, i.e. the field definitions have been modified many many times.
The problem query is generated by ORDT 220.127.116.11 but executed on the JDBC server on OpenVMS.
The bug was noticed after upgrading to ORDT 18.104.22.168 and JDBC 22.214.171.124.
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