Re: Needing to brush up on my internals -- FTS and DB buffer cache
- From: "biti_rainy" <biti_rainy@xxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 28 Apr 2004 22:34:33 +0800
hi,Jesse, Rich
i do not know which version oracle can do that , but =
from oracle 8 ,it is wrong
Best regards
yahoo id: feng_chunpei
A new dba from china
---- from the mail-----
>While surfing Google for HP-UX questions, I ran across an Oracle=
guru page
>that says this:
>
>"Remember, when Oracle performs a full-table scan, the database=
blocks are
>read directly into the program global area (PGA), bypassing the=
data buffer
>RAM."
>
>It's been awhile since I took the Oracle7 DBA courses, but I=
have it stuck
>into my head that FTS data was plopped into the LRU end of the=
DB buffer
>cache's LRU list, instead of the MRU end.
>
>I gave up trying to look through my course material (my=
suggestion of an
>*INDEX* in the student guides apparently wasn't implemented) and=
MetaLink
>showed nothing. I couldn't find anything directly in the 8i=
docs, either,
>but a reference to the CACHE hint that says it causes FTSs to go=
to the MRU
>end of the buffer cache LRU list, but it doesn't say what=
happens by default
>and I didn't want to assume it was how I remembered it.
>
>So, is my memory just bad (it's not unusual) or what? Has this=
changed over
>versions? The article doesn't say what version of Oracle the=
author was
>referring to.
>
>TIA,
>Rich
>
>Rich Jesse System/Database Administrator
>rich.jesse@xxxxxxxxxxxxxxxxx QuadTech, Sussex, WI USA
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