RE: Disk Async IO
- From: "Kevin Closson" <kevinc@xxxxxxxxxxxxx>
- To: "_oracle_L_list" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 6 Sep 2006 12:09:05 -0700
>Our UNIX SA says " Cooked Filesystems have their own
Asynchronous Mechanisim that equally replaces Oracle Async IO"
...Uh, tell him to keep his day job. Having buffers copied into
kernel buffers from the SGA so that bdflush can eventually get to them
is in no way a tradeoff for Oracle making async I/O calls. Not to
mention,
all the important writes (dbwr,lgwr) are synced (either with
open(,O_SYNC,) or
fsync so the topic is nonsensical.
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