You can check data cache and procedure cache space with sp_configure:
sp_configure "total data cache size"
Another way to determine how Adaptive Server uses memory is to examine the memory-related messages written to the error log when Adaptive Server starts. These messages state exactly how much data and procedure cache is allocated, how many compiled objects can reside in cache at any one time, and buffer pool sizes.
These messages provide the most accurate information regarding cache allocation on Adaptive Server. As discussed earlier, the amount of memory allocated for the procedure caches depends on the run value of the procedure cache size configuration parameter.
Each of these error log messages is described below.
Two error log messages provide information about the procedure cache.
server: Number of proc buffers allocated: 556
This message states the total number of procedure buffers (proc buffers) allocated in the procedure cache.
server: Number of blocks left for proc headers: 629
This message indicates the total number of procedure headers (proc headers) available for use in the procedure cache.
A proc buffer (procedure buffer) is a data structure used to manage compiled objects in the procedure cache. One proc buffer is used for every copy of a compiled object stored in the procedure cache. When Adaptive Server starts, it determines the number of proc buffers required and multiplies that value by the size of a single proc buffer (76 bytes) to obtain the total amount of memory required.
A proc header (procedure header) is where a compiled object is stored while in the procedure cache. Depending on the size of the object to be stored, one or more proc headers may be required. The total number of compiled objects that can be stored in the procedure cache is limited by the number of available proc headers or proc buffers, whichever is less.
The total size of procedure cache is the combined total of memory allocated to proc buffers (rounded up to the nearest page boundary), plus the memory allocated to proc headers.
When Adaptive Server starts, it records the total size of each cache and the size of each pool in the cache in the error log. This example shows the default data cache with two pools and a user-defined cache with two pools:
Memory allocated for the default data cache cache: 8030 Kb Size of the 2K memory pool: 7006 Kb Size of the 16K memory pool: 1024 Kb Memory allocated for the tuncache cache: 1024 Kb Size of the 2K memory pool: 512 Kb Size of the 16K memory pool: 512 Kb
