From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 12 Mar 2004 23:39:00 -0800 From: Andrew Morton Subject: Re: Poor DBT-3 pgsql 8way numbers on recent 2.6 mm kernels Message-Id: <20040312233900.0d68711e.akpm@osdl.org> In-Reply-To: <1079130684.2961.134.camel@localhost> References: <1079130684.2961.134.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: maryedie@osdl.org Cc: linux-mm@kvack.org List-ID: Mary Edie Meredith wrote: > > For the last few mm kernels, I have discovered a > performance problem in DBT-3 (using PostgreSQL) > in the "throughput" portion of the test (when the > test is running multiple processes ) on our 8-way > STP systems as compared to 4-way runs and the baseline > kernel results. If I could reproduce this I could find and fix it very quickly. But when I tried to get dbt2 working it was a near-death (and unsuccessful) experience. Did it get any easier in dbt3? I wold be suspecting the darn readahead code again. That was merged into Linus's tree yesterday so perhaps you can test latest -bk? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org