Linux Tuning - Revision history

Khlut: /* Virtual memory subsystem tuning */

2006-01-02T17:56:16Z

Virtual memory subsystem tuning

← Older revision		Revision as of 17:56, 2 January 2006
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	# echo 1500000 > /proc/sys/net/core/rmem_max		# echo 1500000 > /proc/sys/net/core/rmem_max
	# echo 1500000 > /proc/sys/net/core/rmem_default		# echo 1500000 > /proc/sys/net/core/rmem_default
			==Virtual memory subsystem tuning==
			===For Linux version 2.4.===
			# echo 30 10 0 0 4 3000 70 0 0 > /proc/sys/vm/bdflush
			===For Linux version 2.6.===
			# echo 5 > /proc/sys/vm/dirty_background_ratio
			# echo 70 > /proc/sys/vm/dirty_ratio
			# echo 4 > /proc/sys/vm/dirty_writeback_centisecs
			# echo 3000 > /proc/sys/vm/dirty_expire_centisecs

	==Links==		==Links==

Khlut at 17:40, 2 January 2006

2006-01-02T17:40:50Z

← Older revision		Revision as of 17:40, 2 January 2006
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	Data about kernel tuning will be collected here.		Data about kernel tuning will be collected here.
			==Network tuning==
			To allow receive of multicast packets it is necessary to set route rules for multicast:

			# route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0

			To avoid packet lossing it is necessary to increase a size of socket receive buffer to 1500000 bytes (tested with [[Recorder\|ElphelOgm]] on Intel(R) Pentium(R) 4 CPU 3.20GHz with 100Mbit ethernet card and multicast flow from the camera about 6MB/s).

			# echo 1500000 > /proc/sys/net/core/rmem_max
			# echo 1500000 > /proc/sys/net/core/rmem_default

	==Links==		==Links==

Gabriel at 17:23, 28 December 2005

2005-12-28T17:23:44Z

← Older revision		Revision as of 17:23, 28 December 2005
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	~~Here~~ will be collected ~~data about kernel tuning~~.		Data about kernel tuning will be collected here.

	==Links==		==Links==

Khlut at 17:40, 27 December 2005

2005-12-27T17:40:21Z

New page

Here will be collected data about kernel tuning.

==Links==
[http://sourceforge.net/search/?type_of_search=forums&forum_id=371579&group_id=105686&atid=0&words=proc%2F&Search=Search Old discussions on SourceForge]

[http://www.laukas.com/knbase/linux_special/ Linux Tuning Guide] (for 2.4 kernels)

[http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/ref-guide/s1-proc-directories.html Red Hat Enterprise Linux 4: Reference Guide: Directories within /proc/]