eG Monitoring
 

Measures reported by TibPgaTest

A PGA is a memory region that contains data and control information for a server process. It is nonshared memory created by Tibero Database when a server process is started. Access to the PGA is exclusive to the server process. There is one PGA for each server process. Background processes also allocate their own PGAs.

If the PGA runs out of memory, then critical server processes may not run. To avoid this, administrators can use the TibPgaTest test to keep an eye on the memory consumption by the PGA and be proactively alerted administrator if one/more server processes are draining memory from the PGA rapidly.

Outputs of the test : One set of results for each target database server being monitored.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Pga_curr_size Indicates the amount of PGA memory that is currently in use. MB Ideally, the value of this measure should be low. A steady rise in this value is a sign of excessive consumption of PGA memory by server processes.
Pga_usage_pct Indicates the percentage of PGA memory that is consumed by the server processes. Percent Ideally, the value of this measure should be low. If this value rapidly approaches 100%, it indicates that the PGA is about to run out of free memory.