From: Mariella Petrini <mariellapetrini@yahoo.com>
To: xfs@oss.sgi.com
Subject: xfs and Linux Linux 2.6.22 and Memory
Date: Thu, 20 Sep 2007 12:17:53 -0700 (PDT) [thread overview]
Message-ID: <435577.15025.qm@web35711.mail.mud.yahoo.com> (raw)
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/
next reply other threads:[~2007-09-20 19:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-20 19:17 Mariella Petrini [this message]
2007-09-20 21:02 ` xfs and Linux Linux 2.6.22 and Memory Eric Sandeen
2007-09-20 23:34 ` David Chinner
2007-09-21 2:14 ` Mariella Petrini
2007-09-21 3:13 ` Jason White
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=435577.15025.qm@web35711.mail.mud.yahoo.com \
--to=mariellapetrini@yahoo.com \
--cc=xfs@oss.sgi.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox