Number of kilobytes allocated for the generic memory heap for Caché. This is the allocation from which the Lock table, the NLS tables, and the PID table are also allocated. For Asian locales, add one extra megabyte (1024 KB) to the total gmheap value.
To ensure optimal performance during a journal restore, InterSystems recommends increasing the generic memory heap size; see Restore Journal Files in the “Journaling” chapter of the Cache Data Integrity Guide for more information.
The generic memory heap (gmheap) is sometimes known as the shared memory heap (SMH).
16 MB to one terabyte. The default is 37568 KB (37 MB). On IBM AIX and HP-UX, the default is 53952 KB (54 MB).
On the page System Administration > Configuration > Additional Settings > Advanced Memory, in the gmheap row, select Edit. Enter a number of kilobytes.