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Full Discussion: Increase for the Page space
Operating Systems AIX Increase for the Page space Post 302452239 by john1212 on Thursday 9th of September 2010 04:40:52 PM
Old 09-09-2010
Hi,

The implementation of the policy page-space is very complicated to make it real effective.
Sometimes, with some hardware configurations recommended the development of several page-space, one page on each local disk. Then the operations on the page space are actually performed in the area of the disk cache, avoiding a physical write to disk.
For example, a large page swap disk causes the transmission swap-memory block / limit the availability of disk space. IBM does not allow the page to swap more than 20% of disk capacity.
As for the price of IBM introduces newer SSDs. Oracle Database already knows how to use it.
As for page space even remember the versions of AIX 4.x
For example, NFS needs a lot of page space. What if almost all the disk space is available via NFS.
Applications with databases, CATIA want most memory and swap.
The real-time systems would be ideal that the system did not benefit from the swap, but it's just an idea.
Each disk operation is extremely longer time than in memory, cpu very speed, therefore, multi-tasking.
I admit that given by me default values are sometimes inadequate.
Often better to create a second page-space on the second disk than to increase an existing one. Often better to create file page-space then create or increase page-space. You can deactivate file without reboot!!!!
Bye
 

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tuned-main.conf(5)				      tuned-main.conf file format description					tuned-main.conf(5)

NAME
tuned-main.conf - Tuned global configuration file SYNOPSIS
/etc/tuned/tuned-main.conf DESCRIPTION
This man page documents format of the Tuned global configuration file. The tuned-main.conf file uses the ini-file format. dynamic_tuning=BOOL This defines whether the dynamic tuning is enabled. It is boolean value. It can be True or 1 if the dynamic tuning is enabled and False or 0 if disabled. In such case only the static tuning will be used. Please note if it is enabled here, it is still possible to individually disable it in plugins. sleep_interval=INT Tuned daemon is periodically waken after INT seconds and checks for events. By default this is set to 1 second. If you have Python 2 interpreter with applied patch from Red Hat Bugzilla #917709 this controls responsiveness time of Tuned to commands (i.e. if you request profile switch, it may take up to 1 second until Tuned reacts). Increase this number for higher responsiveness times and more power savings (due to lower number of wakeups). In case you have unpatched Python 2 interpreter, this settings will have no visible effect, because the intepreter will poll 20 times per second. update_interval=INT Update interval for dynamic tuning (in seconds). Tuned daemon is periodically waken after INT seconds, updates its monitors, calcu- lates new tuning parameters for enabled plugins and applies the changes. Plugins that have disabled dynamic tuning are not pro- cessed. By default the INT is set to 10 seconds. Tuned daemon doesn't periodically wake if dynamic tuning is globally disabled (see dynamic_tuning) or this setting set to 0. This must be multiple of sleep_interval. EXAMPLE
dynamic_tuning = 1 sleep_interval = 1 update_interval = 10 FILES
/etc/tuned/tuned-main.conf SEE ALSO
tuned(8) AUTHOR
Written by Jaroslav karvada <jskarvad@redhat.com>. REPORTING BUGS
Report bugs to <power-management@lists.fedoraproject.org>. Jaroslav karvada 15 Oct 2013 tuned-main.conf(5)
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