May 30, - 7: Tom Kyte - Last updated: June 01, - 9:
Event Waits Time cs Wt Time control file parallel write 2, 33, While you say "recovery isn't important" -- we would beg mightly to differ.
Checkpoints are NOT something you want to minimize - in fact, you want them to happen continously they happen in the background -- the only time your foreground process has to wait for them is when they didn't have time to FINISH in the background!!! A bigger log buffer and FAR FAR FAR fewer commits you are probably committing way way too much -- that is causing extra control file writes and log waits - the only time you want for logs; when you commit or the redo log buffer is totally full.
Stop committing so much I'm guessing on that -- people "love to commit" for some reason.
Make a much much larger redo log buffer. Tune the control and log devices. If it is, please let us know via a Review Reviews August 21, - 2: A reader meant to select 5 stars August 21, - 2: A reader tuning control file parallel write wait event June 12, - Wayne from Texas Tom, AS always, great job.
I am getting waits on a box that is not in production, yet sun v Next, will be the analyzing the stats to see if we need to budget for better laid out drive arrays Wayne June 12, - I've never met one of those before. That is usually the manager doing that because they see it is cheaper and therefore must be "better": September 16, - 2: We recently put a 9i RAC database into production and we're seeing the following in statspack: Top 5 Timed Events Event Waits Time s Ela Time control file sequential read 7, 7 I have a few questions.
We don't see this behavior in any of our non-RAC 9i databases. Is there a view I can query to get this information?
Followup September 16, - 3: RAC the background processes are thing that would write to the control file the parallel write.
Thanks September 16, - 3: They spent almost 8 months tuning the application so I wasn't worried about the performance, just curious why we saw the control file events in our RAC timed events and not in non-RAC. This has been very helpful to us.I wouldn't recommend doing this.
My suggestion is a stored procedure. Here's how though, Create a file connection under connection manager.
Open properties for the file connection, and edit the expressions. If the db file parallel write average wait time is greater than 10 centiseconds (or ms), this normally indicates slow I/O throughput.
You can improve the average wait time in a number of ways. You can improve the average wait time in a number of ways. CALL FOR PAPERS. The DEFCON 16 Call for Papers is now Closed! The DEFCON 16 speaking schedule is complete, with occasional minor adjustments.!
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You can also subscribe to the DEFCON RSS Feed for up to the minute news. Hi Amit, I received 4 dump files for a client database that he exported on same file share ph-vs.com DB is around 1 TB Now due to space constraint I was able to place 3 dumps on one file share and the 4th on anther file share different ph-vs.com my dump_directory can only point to one file share location how can I import this full dump .
Oracle RAC 12c Database on Linux Using VirtualBox By Sergei Romanenko October, This article describes the installation of Oracle Database 12c Release 1 ( bit) RAC on Linux (Oracle Linux bit) using VirtualBox (). NOTE: I have written a better script for generic multithreading which I have covered in my post ph-vs.com you are looking for a script to cover your every day needs, please read that article instead as I believe it is a better script.