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Memory Rule Report

The following example shows a Memory Rule report:

Full Analysis              NODE01 (VAXstation 3100)                     Page   1


PA    Vx.x


Thursday 20-FEB-1997 00:00 to 23:59
CONCLUSION 1.

	While excessive page faulting was occurring, there were some  users  running  images  which
	seemed to want more memory than their WSEXTENTS allowed.  If the  WSEXTENTS for  these 
	users were larger, there may have been less page faulting.

	Increase the WSEXTENT  for  the  following  users.   If batch  queue  settings  for  working
	set  extents  are causing the limitation, increase  those.   If  detached processes are
	causing the problem, increase the working set  extents  specified  in  either  the 
	"RUN/PROCESS" commands, or the calls to the $CREPRC System Service or LIB$SPAWN Runtime
	Library Routine.  As  a  last  resort for  detached  processes,  increase  the 
	PQL_DWSEXTENT SYSGEN parameter if it is responsible for  establishing the working set extent
	value for the detached process.

	Total number of users needing an increase :  2

	User name(s)
	------------ 
	SMITH 
	CORREY

CONDITIONS
	1.  SOFT_FAULT_RATE .GE. 100.00 * SOFT_FAULT_SCALING .OR. HARD_FAULT_RATE .GE. 10.00 *
	     HARD_FAULT_SCALING 
	2.  IMAGE_ACTIVATION_RATE .LT. 0.50 * IMG_ACT_RATE_SCALING 
	3. SYSGEN_MPW_HILIMIT + SYSGEN_FREEGOAL .LT. MEMORY_PAGES_NOT_ALLOC_TO_VMS * ( 0.04 + 	    0.05 ).OR. PAGES_ON_FREELIST .GE. SYSGEN_FREEGOAL .OR. HARD_FAULT_RATE .GE. 10.00 *
	    HARD_FAULT_SCALING 
	4. SYSGEN_MPW_HILIMIT + SYSGEN_FREEGOAL .GE. MEMORY_PAGES_NOT_ALLOC_TO_VMS * 0.05 .OR.
	    SOFT_FAULT_RATE .GE. 100.00 * SOFT_FAULT_SCALING 
	5. PROCESSES_NEED_MORE_EXTENT .EQ. 1.00 
	6. OCCURRENCES .GE. 1
EVIDENCE 
	Working Set  Time range           Avg      Image      Faults     Avg  sz    No
User             ------------ (batch jobs   Image   W.Set  flts/ -----------    of Free of 
Name      Quota Extent   are flagged) Name   Size  cpusc  Hrd   Soft   List   Tims 
-----         -----    ------       -----------   ------     ----     -----    ---     ----    -----   ----
  1                       2               3                4          5         6       7        8       9       10
SMITH          200    200 
		11:34-13:34  LOGINOUT    163   288   1  288  12262    4 
		11:34-15:14    TEST31    195   268   0  268  12468    5 
		11:34-13:30       SET    179   363   2  363  12765    2

CORREY   2048  4000 (batch)
		13:16-13:18    TEST33   4000  2046   0 2046  11162    2

The following statements are keyed to the columns in the previous Memory Rule report:

  1. User name associated with a process.
  2. Working set quota and working set extent.
  3. Time range for which selected image records for this process are summarized.
  4. The first 12 characters of the image name string associated with the user's process.
  5. Average working set size (in pages) for the user's process while running the specified image.
  6. Total number of page faults for the user's process while running the specified image, divided by the CPU seconds for the same period.
  7. Average system-wide hard page fault rate during the major sampling intervals when the user's process ran the specified image.
  8. Average system-wide soft page fault rate during the major sampling intervals when the user's process ran the specified image.
  9. Average size of the free page list (in pages) during the periods when the user's process ran the specified image.
  10. Number of times that a Performance Manager process or image record supports the evidence.

In the previous Memory Rule report example, the total number of page faults per CPU second are in the range of 268 to 363 for user Smith, and 2046 for user Correy. This high rate of page faulting probably contributed to the system-wide soft page fault rate (ranging from 106 to 791), which exceeded the threshold of 100. This occurred 13 times (4+5+2+2) because Smith's WSEXTENT was too low at the current value of 200 and Correy's WSEXTENT was too low at its value of 4000.