Same query with different response time
From: Lok P <loknath.73_at_gmail.com>
Date: Sat, 26 Jun 2021 19:48:26 +0530
Message-ID: <CAKna9VaYoJ6ZEKXwyfgYAAyQ=247PdhvO49C1YvD7gXxjfPwJQ_at_mail.gmail.com>
Hello Listers, We have seen TSE (tablespace encryption) implementation in the past in multiple databases but have not verified any performance aspect of this and we have also not got any complaint and now this has been mandated by the security team to do it for all the databases. However, we recently migrated one of the database to TSE i.e. tablespace encryption(Not column level TDE) and it's the lower environment/dev database, and dev team sent us few sql monitors noting performance degradation post TSE (some were ~100% slower which we were not expecting).
Date: Sat, 26 Jun 2021 19:48:26 +0530
Message-ID: <CAKna9VaYoJ6ZEKXwyfgYAAyQ=247PdhvO49C1YvD7gXxjfPwJQ_at_mail.gmail.com>
Hello Listers, We have seen TSE (tablespace encryption) implementation in the past in multiple databases but have not verified any performance aspect of this and we have also not got any complaint and now this has been mandated by the security team to do it for all the databases. However, we recently migrated one of the database to TSE i.e. tablespace encryption(Not column level TDE) and it's the lower environment/dev database, and dev team sent us few sql monitors noting performance degradation post TSE (some were ~100% slower which we were not expecting).
Attached are a few of the sql monitors which we got , stating the execution plan is same and volume is same , yet there is significant increase in response time. So I am not sure if we can validate from the sql monitor report, if the increase in execution time is only because of tablespace encryption or anything else. So can you please guide me here, how i can validate from this attached sql monitor if the degraded response time is because of TSE/tablespace encryption or anything else and how we can fix this issue?
It's version 19.9.0.0.0 of Oracle.
Regards
Lok
-- http://www.freelists.org/webpage/oracle-lReceived on Sat Jun 26 2021 - 16:18:26 CEST
- text/plain attachment: Sql_Monitor_report1.txt