>Samthecrazyman: Small tidy up

2012-05-22T14:19:13Z

Small tidy up

← Older revision		Revision as of 14:19, 22 May 2012
Line 1:		Line 1:
	shmmax is a kernel parameter that defines how much shared memory a program can be allocated. You may need to up or ~~down~~ this limit for a program to work or for security. This guide will show you how.		shmmax is a kernel parameter that defines how much shared memory a program can be allocated. You may need to increase or decrease this limit for a program to work or for security. This guide will show you how.

	== What you need to know ==		== What you need to know ==
Line 8:		Line 8:

	# Open KWrite.		# Open KWrite.
	# ~~Goto~~ 'File' and then 'Open'.		# Go to 'File' and then 'Open'.
	# You'll need to click 'root' down the left hand side (usually the red folder). Navigate to <code>etc</code>. You then need to find the file <code>sysctl.conf</code> (The full path to the file is <code>/etc/sysctl.conf</code>).		# You'll need to click 'root' down the left hand side (usually the red folder). Navigate to <code>etc</code>. You then need to find the file <code>sysctl.conf</code> (The full path to the file is <code>/etc/sysctl.conf</code>).
	# Click at the bottom of the typable area, ready to type.		# Click at the bottom of the typable area, ready to type.
	# Type or copy and paste the following statement: <code>kernel.shmmax = <value></code> (<code><value></code> needs replacing with the amount of shared memory you want each program to be allowed. This value is in '''bytes'''.		# Type or copy and paste the following statement: <code>kernel.shmmax = <value></code> (<code><value></code> needs replacing with the amount of shared memory you want each program to be allowed. This value is in '''bytes''').
	# Once you have the statement in place, click the 'Save' button across the top toolbar (usually with a floppy disk icon). The title at the top of the window should not read '(Modified)'.		# Once you have the statement in place, click the 'Save' button across the top toolbar (usually with a floppy disk icon). The title at the top of the window should not read '(Modified)'.
	# Close KWrite and restart your system.		# Close KWrite and restart your system.

>Samthecrazyman: Created, from Dokuwiki

2012-02-29T03:11:52Z

Created, from Dokuwiki

New page

shmmax is a kernel parameter that defines how much shared memory a program can be allocated. You may need to up or down this limit for a program to work or for security. This guide will show you how.

== What you need to know ==

This is a pretty simple procedure. All you need to know is how to use KWrite and Konsole.

== Changing shmmax permanently ==

# Open KWrite.
# Goto 'File' and then 'Open'.
# You'll need to click 'root' down the left hand side (usually the red folder). Navigate to <code>etc</code>. You then need to find the file <code>sysctl.conf</code> (The full path to the file is <code>/etc/sysctl.conf</code>).
# Click at the bottom of the typable area, ready to type.
# Type or copy and paste the following statement: <code>kernel.shmmax = <value></code> (<code><value></code> needs replacing with the amount of shared memory you want each program to be allowed. This value is in '''bytes'''.
# Once you have the statement in place, click the 'Save' button across the top toolbar (usually with a floppy disk icon). The title at the top of the window should not read '(Modified)'.
# Close KWrite and restart your system.
# Once restarted, open Konsole.
# At the command line, type <code>cat /proc/sys/kernel/shmmax</code>.
# The value should now read the same as the <code><value></code> you entered earlier.

== Troubleshooting ==

* Remember that the <code><value></code> must be in '''bytes'''.
* 512MB in PostgreSQL gives the value 572383232 bytes.

Shmmax - Revision history

>Samthecrazyman: Small tidy up

>Samthecrazyman: Created, from Dokuwiki