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12.2.0.1 parallel_max_servers read as 0 from spfile

edited Sep 21, 2020 12:55AM in Database Administration (MOSC) 8 commentsAnswered ✓

Hello community,

I have a problem related to performance of queries on 12.2.0.1 compared to 11g and 12.1.

The configuration of new 12.2 server is similar to 12.1 server. On 12.1 it works fine. Both databases are installed on Windows Server 64bit

After further investigation I figured out, that parallel_max_servers is set to 240 in spfile (Verified with notepad++, by opening spfile.ora)

But this parameter is loaded with value 0, based on %ORACLE_HOME%\diag\rdbms\mfp\mfp\trace\alert_sid.log

This causes the parallel_servers_target parameter set to 0 too on query "show parameters parallel".

So I guess this causes slow down in query execution.

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