How do I boost the Linux performace Post: 302256723

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Operating Systems Linux How do I boost the Linux performace Post 302256723 by otheus on Monday 10th of November 2008 12:05:01 PM

11-10-2008

Registered User

Quote:

Originally Posted by jayfriend

Hi Otheus,

Following is the output of tune2fs.

/boot is not very interesting. Run it on /dev/hda3

Quote:

I tried to execute the following commands (hdparm) to tune the harddrive, but they don't seem to be working on my PC. Please take a look them and guide me further.

Noo! You have SCSI disks!! As you noted in a previous message, /boot is on /dev/sda, which means SCSI. Go into your SCSI Bios setup (during a reboot) and see if you can determine the bus speed and max data rate for the device. Examples will be: 20, 40, 80, 160, 320 Mbits / s. Also see if you can identify the hard drive. If the SCSI BIOS doesn't help you, you can use dmesg or cat /proc/scsi/scsi

Quote:

Code:

[root]# fsck
fsck 1.39 (29-May-2006)
e2fsck 1.39 (29-May-2006)
/dev/VolGroup00/LogVol00 is mounted.  

WARNING!!!  Running e2fsck on a mounted filesystem may cause
SEVERE filesystem damage.

Do you really want to continue (y/n)? yes

NOOOOO NEVER DO THAT (unless you know what you're really doing). Did you not see the "SEVERE damage" part of the message?

Consider yourself lucky.

otheus

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LEARN ABOUT SUSE

elvtune

ELVTUNE(8)						      System Manager's Manual							ELVTUNE(8)

NAME

       elvtune - I/O elevator tuner

SYNOPSIS

       elvtune [-r r_lat] [-w w_lat] [-b b_max] device...
       elvtune -h
       elvtune -v

DESCRIPTION

       elvtune	allows	to  tune the I/O elevator per blockdevice queue basis. The tuning can be safely done at runtime. Tuning the elevator means
       being able to change disk performance and interactiveness. In the output of elvtune the address of the queue tuned will be shown and it can
       be  considered  as  a queue ID.	For example multiple partitions in the same harddisk will share the same queue and so tuning one partition
       will be like tuning the whole HD.

OPTIONS

       -r r_lat
	      set the max latency that the I/O scheduler will provide on each read.

       -w w_lat
	      set the max latency that the I/O scheduler will provide on each write.

       -b b_max
	      max coalescing factor allowed on writes when there are reads pending in the queue.

       -h     help.

       -v     version.

NOTE

       Actually the only fields tunable are those relative to the IO scheduler. It's not possible to select a one-way or two-way elevator yet.

       For logical blockdevices like LVM the tuning has to be done on the physical devices. Tuning the queue of the LVM logical device is useless.

RETURN VALUE

       0 on success and 1 on failure.

HISTORY

       Ioctls for tuning elevator behaviour were added in Linux 2.3.99-pre1.

AUTHORS

       Andrea Arcangeli <andrea@suse.de> SuSE

AVAILABILITY

       The elvtune command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

Version 1.0							   14 March 2000							ELVTUNE(8)

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elvtune