Database Administration (MOSC)

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ckpt process blocking other sessions

edited Jan 20, 2011 1:51AM in Database Administration (MOSC) 2 commentsAnswered
 Hi All,

I am wondering if anyone encounter this problem that I have here.

Recently, after upgrade from 10g to 11gR2 our database is regularly having ckpt process blocking other user sessions which are doing inserts, create & drop table & truncate table.

There is no  error from alert.log. Only getting EM alert saying session SID 123 is blocking 8 other sessions.

When we check the session SID 123, it is actually the CKPT background process.

We have configured init.ora parameters db_writer_processes=2 and commit_logging=batch on this DB after the upgrade due to slow ETL performance. Compatible parameter is still set to 10.2.0.4.0 currently.

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