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Re: DBWn performs batched (multiblock) writes to improve efficiency

From: Mladen Gogala <>
Date: Wed, 21 Apr 2004 17:19:58 -0400
Message-ID: <>

Tanel, you want to take a look at the strace utility, which exists on both Linux and CYGWIN. It traces all system services that a prices makes, IO calls included. On Solaris, the same utility is called "truss", while HP-UX has "tusc". AIX 5.2 also has truss, while Irix has something called "par". On my favorite OS of all times, I could do run/debug ORACLE_HOME:[bin]sqlplus, and, if linked in the "single task mode", I would see the complete code of the server side. Dave Cutler turned such a noble OS into a hideous monstrosity that has ruined so many good PC's.

On 04/21/2004 04:57:40 PM, Tanel P?der wrote:
> I tested with 10g on linux and saw up to 112k coalesced writes (that was the
> maximum in my system), however I couldn't test this on 9.2 nor 10g beta on
> my windows (the _dbwr_tracing seems to behave differently in these and I
> don't have any utility to trace IO system calls in windows).

Mladen Gogala
Oracle DBA

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Received on Wed Apr 21 2004 - 16:16:30 CDT

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