Firebird 2.5 Language Reference → Firebird 2.5 Language Reference → Monitoring Tables → MON$MEMORY_USAGE
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MON$MEMORY_USAGE

MON$MEMORY_USAGE displays memory usage statistics.

Column Name Data Type Description
MON$STAT_ID INTEGER Statistics identifier
MON$STAT_GROUP SMALLINT Statistics group:
0 - database
1 - connection
2 - transaction
3 - operator
4 - call
MON$MEMORY_USED BIGINT The amount of memory in use, in bytes. This data is about the high-level memory allocation performed by the server. It can be useful to track down memory leaks and excessive memory usage in connections, procedures, etc.
MON$MEMORY_ALLOCATED BIGINT The amount of memory allocated by the operating system, in bytes. This data is about the low-level memory allocation performed by the Firebird memory manager—the amount of memory allocated by the operating system—which can allow you to control the physical memory usage.
MON$MAX_MEMORY_USED BIGINT The maximum number of bytes used by this object
MON$MAX_MEMORY_ALLOCATED BIGINT The maximum number of bytes allocated for this object by the operating system

[Note] Note

Not all records in this table have non-zero values. MON$DATABASE and objects related to memory allocation have non-zero values. Minor memory allocations are not accrued here but are added to the database memory pool instead.

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Firebird 2.5 Language Reference → Firebird 2.5 Language Reference → Monitoring Tables → MON$MEMORY_USAGE