TPX slot pool usage information

Products

• TPX - Session Management

Issue/Introduction

The following is a summary of the main uses of each slot pool, ABOVE and BELOW the 16Mb line:

NOTE: To make the most efficient use of storage, SLOT pool sizes should match as detailed below.

Environment

Release: 5.4

Component  TPX for Z/OS

Resolution

Note that starting with TPX 5.1 we strongly recommend to set 'System Storage' to 2048K. 


Storage Allocated (below 16m line)      [ SMRT option 2 ]
  ----------------------------------                      
                                                          
      System Storage:    2048 K    * DSA Overload at:   80 %
    Minimum Storage:   2048 K    * Slot Overload at:    80 %
      DSA Percentage:    75 %                             
                                                          

	Size (Bytes)		Use
	TPX version 5.4	TPX version 5.3
SLOT 1	8	8	NO SET STRUCTURES
SLOT 2	16	16	VSAM I/O USAGE
SLOT 3	32	32	VSAM I/O USAGE
SLOT 4	64	64	BIND IMAGES SESSION DATA STRUCTURES
SLOT 5	128	128	NETSPY MESSAGE BUFFERS
SLOT 6	256	256	VSAM I/O USAGE
SLOT 7	512	512	NO SET STRUCTURES
SLOT 8	1024	1024	SOFTCOPY (/P) DATA
SLOT 9	2048	2048	SOFTCOPY (/P) DATA
SLOT 10	4096	4096	MISCELLANEOUS BUFFERS VSAM
SLOT 11	8192	8192	MISCELLANEOUS BUFFERS VSAM
SLOT 12	10240	10240	MISCELLANEOUS BUFFERS VSAM

 

  Storage Allocated (above 16m line)      [ SMRT option 3 ]
  ----------------------------------
                                    
      XA Storage:     032768 K      ( Default )
      DSA Percentage:     20 %      
                                    

	Size (Bytes)		Use
	TPX version 5.4	TPX version 5.3
SLOT 1	32	32	VARIABLES UPB
SLOT 2	64	64	VARIABLES SHORTER TENMSGL LINES
SLOT 3	128	128	LONGER TENMSGL LINES EB RPL LSIB NIB NSTE ACB - New Location with 5.4
SLOT 4	136	136	UENTRY
SLOT 5	208	200	UINDEX
SLOT 6	352	352	AMAP - New Location with 5.4 RPQB PART OF SCREEN STRUCTURE PWDPH
SLOT 7	456	456	SB RPQB
SLOT 8	512	512	VENTRY RPQB
SLOT 9	1024	1024	VINDEX RPQB PANEL STRUCTURES
SLOT 10	2048	2048	SCREEN STRUCTURES PANEL STRUCTURES RPL BUFFERS
SLOT 11	4096	4096	SCREEN STRUCTURES PANEL STRUCTURES
SLOT 12	8192	8192	PANEL STRUCTURES

Additional Information

Article Id: 52686 - What is 'System Storage'?