Checkpoint frequency when the database is open.

Dear All,
I am facing a lot of problem with some checkpoint parameters.
FAST_START_IO_TARGET = value in what?
LOG_CHECKPOINT_INTERVAL = value in no. of OS blocks
LOG_CHECKPOINT_TIMEOUT = value in seconds
Almost every places (Documentation and our books) it is
mentioned that they are used only for instance recovery. Is it
true? If so, then we don't have any way to force checkpoint to
occur frequently when the database is running. Is there any way?
I think the last two parameters work also when the database is
running.
If multiple parameters used for checkpoint will oracle use FIFO
system or it will choose only the most aggressive parameter?
Please see the Backup&Recovery slide 2-12. It show the case of
instance recovery. As the most aggressive parameter
LOG_CHECKPOINT_INTERVAL is issuing checkpoint first. Will there
be any checkpoint at "C" or checkpoint will occur at any other
point again set by LOG_CHECKPOINT_INTERVAL ?
Please help me to solve this problem.
Have a nice time,
Tarek
BASE Ltd, Dhaka

There is an execellent document available on metalink explaining
the details of the checkpoint mechanism and how to tune it.
Document's name is "Checkpoint Tuning and Troubleshooting Guide",
Doc Id is 147468.1.
That document explains the parameters you ask about and
tells you a helluva lot about checkpoints and how to get
them to do just as you want.
If you do not have access to Metalink, drop me a mail
notice at [email protected], and I'll send you
a copy via email.
Hope that helps.
All the best
Michael

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Checkpoint frequency when the database is open.

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