OMS_HEAP_STATISTICS

Definition

The system table OMS_HEAP_STATISTICS describes the statuses of allocators used in SAP liveCache technology.

Structure

OMS_HEAP_STATISTICS

DESCRIPTION

CHAR(40)

Name of the allocator

TOTAL_HEAP_USAGE

FIXED(20)

Currently used memory (bytes)

MAXTOTAL_HEAP_USAGE

FIXED(20)

Maximum used memory (bytes)

RESERVED

FIXED(20)

Memory managed by the allocator (bytes)

ALLOC_CNT

FIXED(20)

Number of memory allocations

FREE_CNT

FIXED(20)

Number of memory releases

SYSTEM_ALLOC_CNT

FIXED(20)

Number of memory reservations in the base allocator

SYSTEM_FREE_CNT

FIXED(20)

Number of memory releases in the base allocator

TOTAL_SPINLOCKS

FIXED(20)

Number of attempts to get the spin lock

COLLISIONS

FIXED(20)

Number of failed attempts to get the spin lock

TOTAL_SPINLOOPS

FIXED(10)

Number of attempts to get the spin lock without prior release of the CPU

TOTAL_YIELDLOOPS

FIXED(10)

Number of attempts to get the spin lock after prior release of the CPU

MAX_SPINLOOPS

FIXED(10)

Maximum number of attempts to get the spin lock without prior release of the CPU

MAX_YIELDLOOPS

FIXED(10)

Maximum number of attempts to get the spin lock after prior release of the CPU

ERROR_CNT

FIXED(10)

Number of errors detected and automatically corrected by the allocator

The OMS_HEAP_STATISTICS system table replaces the OMS_MEMORY_USAGE table, which should no longer be used.

See also:

Database Administration in CCMS: SAP liveCache Technology, Heap Usage, Memory