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Data Cache [message #249056]

Tue, 03 July 2007 03:28

shahnazurs
Messages: 240
Registered: June 2005
Location: India

Senior Member

Hi,

what is the difference between db_16k_cache_size and db_block_buffers?
my data_block_size is 16k

Thanks,
Shahnaz.

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Re: Data Cache [message #249060 is a reply to message #249056]

Tue, 03 July 2007 03:58

Michel Cadot
Messages: 68737
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

You can't use db_16k_cache_size if your block size is 16K.
db_nk_cache_size is for non standard block size.

Btw, don't use db_block_buffers, use db_cache_size. Or better use SGA_TARGET.

Regards
Michel

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Re: Data Cache [message #249329 is a reply to message #249060]

Wed, 04 July 2007 01:58

shahnazurs
Messages: 240
Registered: June 2005
Location: India

Senior Member

Thanks Michel,
Please let me know what is that non standard block size?
Is 16k is standard one? why we have this parameter...(db_nk_cache_size )

Thanks.

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Re: Data Cache [message #249338 is a reply to message #249329]

Wed, 04 July 2007 02:19

Michel Cadot
Messages: 68737
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

A non standard block is one that is different from the SYSTEM tablespace block size (also known as database block size).

Regards
Michel

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