Re: Datapump import disable_archive_logging will still generate redo?

Hi,

 I have a Oracle database version 12.2.0.1 running in noarchivelog mode. I`m wondering if datapump import parameter TRANSFORM=DISABLE_ARCHIVE_LOGGING:Y will reduce the redo generated and thus improve the import timing?

 I have an import of a LOB table which takes about 10 hours to import about 85GB of data. AWR reports show almost all the time spent on "log file switch (checkpoint incomplete)" event. There were 3 redo log groups configured with each member size 200MB.

 I increased to 6 groups with each member 1.5GB but I am still getting these wait events accounting to 94% of the DB time. And now the Avg wait for these events has gone up to about 34 seconds from 7-8 secs last time.

 How can I get rid of the log file switch (checkpoint incomplete) events? Increase DBwriters? FAST_START_MTTR_TARGET?

Thanks
Regards,
Ashish

DXC Technology Company -- This message is transmitted to you by or on behalf of DXC Technology Company or one of its affiliates. It is intended exclusively for the addressee. The substance of this message, along with any attachments, may contain proprietary, confidential or privileged information or information that is otherwise legally exempt from disclosure. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient of this message, you are not authorized to read, print, retain, copy or disseminate any part of this message. If you have received this message in error, please destroy and delete all copies and notify the sender by return e-mail. Regardless of content, this e-mail shall not operate to bind DXC Technology Company or any of its affiliates to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. --.