From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Thu, 20 Sep 2007 12:44:39 -0700 (PDT) Received: from web35711.mail.mud.yahoo.com (web35711.mail.mud.yahoo.com [66.163.179.165]) by oss.sgi.com (8.12.10/8.12.10/SuSE Linux 0.7) with SMTP id l8KJiUgf000776 for ; Thu, 20 Sep 2007 12:44:31 -0700 Date: Thu, 20 Sep 2007 12:17:53 -0700 (PDT) From: Mariella Petrini Subject: xfs and Linux Linux 2.6.22 and Memory MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Message-ID: <435577.15025.qm@web35711.mail.mud.yahoo.com> Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: xfs@oss.sgi.com Hi All, I have compiled xfs that is available with Linux 2.6.22 on a Debian 4.0 The system is a 2 cpus (Intel Xeon 3 GHz) with 4 cores each The system has 8 GB of RAM + 2GB of swap I have 4 Hard Drives on the system and each is formatted using xfs Each filesystem is mounted with noatime option I am including the output generated during one of the format: mkfs.xfs -f /dev/sdb1 meta-data=/dev/sdb1 isize=256 agcount=16, agsize=4881374 blks = sectsz=512 attr=0 data = bsize=4096 blocks=78101984, imaxpct=25 = sunit=0 swidth=0 blks, unwritten=1 naming =version 2 bsize=4096 log =internal log bsize=4096 blocks=32768, version=1 = sectsz=512 sunit=0 blks realtime =none extsz=65536 blocks=0, rtextents=0 I have been using an sql server to populate the 4 xfs filesystems. So all the files represents part of a relational database. In each filesystem I have 5 top directory and each directory contains 100,000 files, so in total each filesystem has 500,000 regular files + 5 regular directories. The sql server is the only program that writes the regular files into the xfs filesystems. During the time taken to populate the 4 filesystems (2,000,000 files) I have noticed that approximately 5 GB of RAM were taken. Once all the filesystems were populated I have shutdown the sql server (the only process that accesses/reads/writes the filesystems) and the 5 GB of RAM would not be released. At that point I have unmounted the 4 xfs filesystems and the 5 GB of RAM would be released (be available again). QUESTION: Is there any way to release that amount of memory without unmounting the file systems ? Is that caused to some caching mechanism ? Or could that be caused by something else ? Could you please help ? Thanks a lot in advance for your help, Mariella ____________________________________________________________________________________ Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. http://sims.yahoo.com/