| Measurement |
Description |
Measurement Unit |
Interpretation |
| Num_procs_running |
Indicates the number of processes that are currently running. |
Number |
|
| Handle_count |
Indicates the number of handles opened by the process. |
Number |
An increasing trend in this measure is indicative of a memory leak in the process. |
| No_of_threads |
Indicates the number of threads that are used by the process. |
Number |
|
| Virtual_memory_used |
Indicates the amount of virtual memory that is being used by the process. |
MB |
|
| IO_data_rate |
Indicates the rate at which processes are reading and writing bytes in I/O operations. |
Kbytes/Sec |
This value counts all I/O activity generated by each process and includes file, network and device I/Os. |
| IO_data_oper_rate |
Indicates the rate at which the process is issuing read and write data to file, network and device I/O operations. |
Operations/Sec |
|
| IO_read_data_rate |
Indicates the rate at which the process is reading data from file, network and device I/O operations. |
Kbytes/Sec |
|
| IO_write_data_rate |
Indicates the rate at which the process is writing data to file, network and device I/O operations. |
Kbytes/Sec |
|
| Page_fault_rate |
Indicates the total rate at which page faults are occurring for the threads of all matching
processes. |
Faults/Sec |
A page fault occurs when a thread refers to a virtual memory page that is not in its working set in main memory. This may not cause the page to be fetched from disk if it is on the standby list and hence already in main memory, or if it is in use by another process with whom the page is shared. |
| Working_set |
Indicates the current size of the working set of a process. |
MB |
The Working Set is the set of memory pages touched recently by the threads in the process. If free memory in the computer is above a threshold, pages are left in the Working Set of a process even if they are not in use. When free memory falls below a threshold, pages are trimmed from Working Sets. If they are needed they will then be soft-faulted back into the Working Set before leaving main memory. If a process pattern matches multiple processes, the memory working set reported is the sum of the working sets for the processes that match the specified pattern. Detailed diagnosis for this test provides details of the individual processes and their individual working sets.
Comparing the working set across processes indicates which process(es) are taking up excessive memory.
By tracking the working set of a process over time, you can determine if the application has a memoryleak or not. |