I noticed that our AWR report (on a 12.2 database with encrypted tablespaces)
specifically itemizes elapsed-time and CPU-time spent on tablespace encryption.
It is in the ‘Time Model Statistics’ section.
If your 40%-50% impact is not showing up here – perhaps you have plans changing
or other factors that are causing the issue.
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Robert Freeman
Sent: Monday, June 11, 2018 7:27 PM
To: arun.chugh1610@xxxxxxxxx; Jay.Miller@xxxxxxxxxxxxxxxx
Cc: Oracle Mailing List <oracle-l@xxxxxxxxxxxxx>
Subject: RE: Database Encryption
What version of the database are we talking about here? Always helpful
If it’s a supported version, I’d open an SR with Oracle, to be honest. You
should not be seeing this kind of impact from encryption unless your server was
already sitting on the edge.
Depending on your version, there are known bugs (and – yes – bug fixes) for
problems related to encryption and performance.
Where are you seeing your biggest impacts? CPU, IO response times, changed
execution plans? What was the command you used to do the encryption? Did you
encrypt with or without salt? In other words, what have you done to quantify
the problem you are seeing?
Stay the course and figure out this problem would be my suggestion. Don’t just
jump ship because you’re taking on a little water.
Robert G. Freeman
Deliverer of Enterprise Data®
“Greater than the death of flesh is the death of hope. The death of dreams.
Against this peril we can never surrender. The future is all around us, waiting
in moments of transition, to be born in moments of revelation. No one knows the
shape of that future, or where it will take us. We know only that it is always
born in pain.”
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Arun Chugh
Sent: Thursday, June 07, 2018 12:45 PM
Cc: Oracle Mailing List <oracle-l@xxxxxxxxxxxxx<mailto:oracle-l@xxxxxxxxxxxxx>>
Subject: Re: Database Encryption
Yes right... Did not encrypt the system sysaux undo n temp..
On Thu, Jun 7, 2018, 22:53
You say “almost all the datafiles of the database”. I assume you mean
tablespaces rather than datafiles but just wanted to confirm that you didn’t
encrypt SYSTEM, SYSAUX, UNDO or TEMP?
Sr. Oracle DBA
Behalf Of Arun Chugh
Sent: Wednesday, June 06, 2018 11:51 PM
To: Oracle Mailing List
Subject: Database Encryption
We have encrypted almost all the datafiles of the database, post that the
performance of the database degraded to almost 40-50%
Could anyone suggest what is the other alternative method that we can use in
order to secure data with bit performance impact.