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Operating Systems AIX Why using "%" of Paging size increases & how to decrease this percentage? Post 302430252 by bakunin on Thursday 17th of June 2010 03:07:18 AM
Old 06-17-2010
ross.mather is of course correct. The bottom line of all this is:

Watch the swap consumption over time. If it is rather static you simply have not enough physical memory and your system needs virtual memory (aka swapspace) to compensate for this.

If the swap consumption increases over time one (or several) of your running processes are likely to have a memory leak. That is: they allocate memory without giving it back once they don't use it any more. Giving the system more memory (or swapspace or both) will only increase the time until which the memory is exhausted.

To find out which process(es) use how much memory do the following:

Code:
ps -Alo vsz,pcpu,pid,args | sort -rn

This lists all processes, sorted by their allocated memory, their CPU comsumption, PID and commandline used to invoke them. Repeat this in intervals and compare the output to find the memory hogs.

I hope this helps.

bakunin
 

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class_create(3) 					     Library Functions Manual						   class_create(3)

NAME
class_create - Create a new class LIBRARY
Standard C Library (libclass.a) SYNOPSIS
#include <apar_types.h> #include <sys/class.h> class_change(class_apar_handle_t handle, char *class_name, struct resource_limits *limits); PARAMETERS
The partition descriptor returned by class_open(). The name of the class to change. The input is the new resource limits, the output is the resources available. DESCRIPTION
Create a new class. The created class will be empty. Use class_add() to populate the class. If the value of percent causes the total percentage of all classes to exceed 100%, the call will fail and avail will contain the remaining percentage available. Specify CLASS_RESOURCE_SCHED_DISABLED for the target limit of any resource that is not needed. Note that the calling process must have root access privileges. RETURN VALUES
The operation was successfully completed. An invalid partition handle was specified. The class_name is not an ASCII string. The class_name already exists. No space available in class_name. The requested percentage not is not in the range 0 - 100 or is not CLASS_RESOURCE_SCHED_DISABLED or CLASS_RESOURCE_SCHED_DISABLED. Requested percentage not available. The struct resource_percent <xxx- available> (where xxx is an integer in the range 0-100 representing percentage) will contain the maximum available percentage. SEE ALSO
Functions:class_init(3), class_change(3), class_close(3), class_configure(3), class_get_config_stats(3), class_close(3), class_delete(3), class_destroy(3), class_disable(3), class_enable(3), class_save_database(3), class_restore_database(3), class_load_database(3), class_change_name(3), class_database_file_exists(3), class_database_name(3), class_database_modified(3), class_get_classes(3), class_get_class_members(3), Commands:class_admin(8), runclass(1), class_scheduling(4) Other: The System Administration guide. delim off class_create(3)
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