Re: Page cache

Posted by ErmanArslansOracleBlog on Jun 24, 2019; 1:20pm
URL: http://erman-arslan-s-oracle-forum.124.s1.nabble.com/Page-cache-tp7432p7451.html

SGA is another level.
Having SGA (buffer cache) + Os page cache means double buffering.
However, if you use ASM, you may bypass this double buffering thing.

ASM uses Direct IO .. It does not use a cache. Without ASM, yhen you write, OS writes it into the cache, but Oracle has a cache too.. These caches ignore eachother.. This situation ends up with double buffering.. We dont have double buffering in ASM.