Re: after adding 6 new datafiles the performance go down

>>If you are doing excessive checkpoints you may try
>>increasing the size of log_buffer.

hmmm - this is a new one ! :-)
I know log_checkpoint_interval, log_checkpoint_timeout, increase logfile members and the number of logfile groups... but as far as I know there's no relationship between the frequency of checkpointing and log_buffer !

"Stephen Ashmore" <sashmore_at_neonramp.com> wrote in message news:u6vfh4a3t4t3eb_at_corp.supernews.com...
> Your database may be having trouble completeing checkpoints.
>
> Determine how often it is checkpointing.
> You can set init.ora parameter log_checkpoint_to_alert
> to true.
>
> Also make sure you are not getting a bunch of checkpoint not complete
errors
> in your alert.log.
>
> If you are doing excessive checkpoints you may try
> increasing the size of log_buffer.
>
> You may also try using multiple db_writers or some io_slaves.
>
> Good luck!
>
> Stephen C. Ashmore
> Brainbench MVP for Oracle Administration
> http://www.brainbench.com
>
>
> "Alexander Müller" <it_mueller_at_web.de> wrote in message
> news:a4nojc$cmo$1_at_news.online.de...
> > Hi,
> > i'm adding 3 datafiles and 3 idx-datafiles in two tablespaces, and then
we
> > reorganize parts of the tablespace in this datafiles. After reorganize
the
> > database was with the factor 10 slower.
> >
> > we bring the sga after this action up and we move the files to another
> > disks. But it would be not better. At time we have in both tablespaces
27
> GB
> > / Oracle 7.3.4.5.0 / HP-UX 10.20
> >
> >
> >
> >
> > --
> > best regards
> >
> > Alexander Müller
> >
> >
>
>
Received on Sun Feb 17 2002 - 08:45:00 CST