Hi All,
Few Doubts regarding oracle buffer cache. Here is the
documentation link from 11g R2.
Which Says
"The database uses a
sophisticated algorithm to make buffer access efficient. Pointers to
dirty and nondirty buffers exist on the same least recently used (LRU) list,
which has a hot end and cold end. A cold buffer is one that has not been
recently used. A hot
buffer is frequently accessed and has been recently used."
Now, i
was under impression that there is a different LRU which is LRUW for
write list but this says LRU maintains both cold, dirty, free, hot all
pointers.
Can
someone please explain this and also i had few question
1. How
to you find that particular buffer in hot, cold or dirty ?
2. How
to find buffer is in which list LRU or LRUW ?
To find
this do we need SGA dump and if yes where to find this information.
--
Thanks & Regards,
Taral Desai
Samuel Goldwyn - "I'm willing to admit that I may
not always be right, but I am never wrong."
--
//www.freelists.org/webpage/oracle-l
