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The <DATBASE_SYSTEM_ADMINISTRATOR>.OMS_HEAP_STATISTICS system table 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)

MAX_TOTAL_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

More Information

Database Administration in CCMS, Heap Usage, Memory