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Heap Usage - Table "OMS Heap Usage"

This page provides information about where the content of the displayed table columns on the "OMS Heap Usage" table of the "Heap Usage" application comes from.
The table displayed is depends on the liveCache version.


SAP MaxDB Version 7.9: You find information about OMS heap in SAP MaxDB documentation for example at OMS Heap Usage, OMS Heap, OMS MonitorOMS_HEAP_STATISTICS, MONITOR_OMS. See also note 1128916 and information in this wiki, for example OMS Heap.

liveCache version >= 7.4.02.01 and (7.2.05.08 to 7.2.05.99)
liveCache version < 7.2.05.08 and 7.3 to 7.4.02.00


liveCache Version >= 7.4.02.01 and (7.2.05.08 to 7.2.05.99)

Default
position

Column header and tooltip
in English and German

System table
and column

Remark

Internal:
Field of DDIC structure

 

 

All columns from
SYSDBA.MONITOR_OMS

 

DDIC: OMS_HSTAT

1

Heap Area
Heap Area
Heap-Bereich
Heap-Bereich

DESCRIPTION

 

DESCR

2

Size
Size in Bytes
Größe
Größe in Byte

RESERVED

 

RESERVED

3

Currently Used
Currently Used in Byte
Momentan belegt
Momentan belegt in Byte

TOTAL_HEAP_USAGE

 

HEAPUSAGE

4

Maximum used
Maximum used in bytes
Maximal belegt
Maximal belegt in Byte

MAX_TOTAL_HEAP_USAGE

only >= 7.7.00
Displayed as of 4.6C SP54, 4.6D SP45,
6.10 SP48, 6.20 SP61, 6.20 SP20,
7.00 SP11, 7.10 SP00
(see PTS 1144176 and linked)

MAXHEAPUSG

5

Memory Requests
Memory Requests
Speicheranforderungen
Speicheranforderungen

ALLOC_CNT

 

ALLOC_CNT

6

Memory Releases
Memory Releases
Speicherfreigaben
Speicherfreigaben

FREE_CNT

 

FREE_CNT

7

Requests through Block Allocator
System Memory Requests
Anforderungen via Blockallokator
System-Speicheranforderungen

SYSTEM_ALLOC_CNT

 

SALLOC_CNT

8

Released with BlockAllocator
System Memory Releases
Freigaben via Blockallokator
System-Speicherfreigaben

SYSTEM_FREE_CNT

 

SFREE_CNT

9

SpinLocks
Syncronization with Spin Locks
Spinlocks
Synchronisationen via Spinlocks

TOTAL_SPINLOCKS

 

SPINLOCKS

10

Collisions
Collisions for Spin Locks
Kollisionen
Kollisionen bei Spinlocks

COLLISIONS

 

COLLISIONS

11

SpinLoops
SpinLoops
Spinloops
Spinloops

TOTAL_SPINLOOPS

 

SPINLOOPS

12

YieldLoops
YieldLoops
Yieldloops
Yieldloops

TOTAL_YIELDLOOPS

 

YIELDLOOPS

13

MAX SpinLoops
MAX SpinLoops
MAX-Spinloops
MAX-Spinloops

MAX_SPINLOOPS

 

MAXSPLOOP

14

MAX YieldLoops
MAX YieldLoops
MAX-Yieldloops
MAX-Yieldloops

MAX_YIELDLOOPS

 

MAXYLDLOOP

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liveCache Version < 7.2.05.08 and 7.3 to 7.4.02.00

Description of table columns

Default
position

Column header and tooltip
in English and German

Content of column

Internal:
Field of DDIC structure

 

 

 

DDIC: LVC_MEMORY

1

Name
Name
Bezeichnung
Bezeichnung

Values inserted in the ABAP Coding.
See next table for possible values

NAME

2

Byte
Byte
Byte
Byte

Depending on "Name"/"Bezeichnung"
See next table

BYTE

3

KB
KB
Kbyte
Kbyte

Byte Value / 1024

KB

4

MB
MB
Mbyte
Mbyte

Kilobyte Value / 1024

MB

Description of lines in the table

 

 

 

Systemtable
and Column

Remark

Internal:
Field of DDIC structure

Line

"Name"
in English

"Bezeichnung"
in German

Column of
SYSDBA.OMS_MEMORY_USAGE
for byte value

 

DDIC: OMS_HEAP

1

Size

Größe

RESERVED

 

RESERVED

2

Utilization

Auslastung

TOTAL_HEAP_USAGE

 

USE_BYTE

3

Size of OMS Malloc Area

Größe des OMS-Malloc-Bereichs

USED_BY_OMS_MALLOC

 

OMSMALLOC

4

Size of Reserve Area

Größe des Reservebereichs

EMERGENCE_CHUNK_SIZE

 

CHUNK_SIZE

5

Utilization of Reserve Area

Auslastung des Reservebereichs

EMERGENCY_IN_USE

only >= 7.2.05

EMER_INUSE

6

Maximum Utilization of Reserve Area

Maximale Auslastung des Reservebereichs

EMERGENCE_MAX_USED

only >= 7.2.05

EMER_MAXUS

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