Learn about performance counters for processes

Base Priority

The base priority of the process, which determines the order in which its threads are scheduled for the processor. The base priority is set by the process code, not the operating system. The operating system sets and changes the dynamic priorities of threads in the process within the range of the base.

Priority Base

CPU Time

The total processor time, in seconds, used by the process since it was started.

None

CPU Usage

The percentage of time the threads of the process used the processor since the last update.

% Processor Time

GDI Objects

The number of Graphics Device Interface (GDI) objects currently used by a process. A GDI object is an object from the GDI library of application programming interfaces (APIs) for graphics output devices.

None

Handle Count

The number of object handles in the process’s object table.

Handle Count

I/O Other

The number of input/output operations generated by a process that are neither reads nor writes, including file, network, and device I/Os. An example of this type of operation would be a control function. I/O Others directed to CONSOLE (console input object) handles are not counted.

I/O Other Operations/sec

I/O Other Bytes

The number of bytes transferred in input/output operations generated by a process that are neither reads nor writes, including file, network, and device I/Os. An example of this type of operation would be a control function. I/O Other Bytes directed to CONSOLE (console input object) handles are not counted.

I/O Other Bytes/sec

I/O Read Bytes

The number of bytes read in input/output operations generated by a process, including file, network, and device I/Os. I/O Read Bytes directed to CONSOLE (console input object) handles are not counted.

I/O Read Bytes/sec

I/O Reads

The number of read input/output operations generated by a process, including file, network, and device I/Os. I/O Reads directed to CONSOLE (console input object) handles are not counted.

I/O Read Operations/sec

I/O Write Bytes

The number of bytes written in input/output operations generated by a process, including file, network, and device I/Os. I/O Write Bytes directed to CONSOLE (console input object) handles are not counted.

I/O Write Bytes/sec

I/O Writes

The number of write input/output operations generated by a process, including file, network, and device I/Os. I/O Writes directed to CONSOLE (console input object) handles are not counted.

I/O Write Operations/sec

Image Name

Name of the process.

The process name in the Instances box

Memory Usage

The amount of main memory, in kilobytes, used by the process.

Working Set

Memory Usage Delta

The change in memory use, in kilobytes, since the last update. Unlike System Monitor, Task Manager displays negative values.

None

Non-paged Pool

The amount of memory, in kilobytes, used by a process. Operating system memory that is never paged to disk. Paging is the moving of infrequently used parts of a program’s working memory from RAM to another storage medium, usually the hard disk.

Pool Non-paged Bytes

Page Faults

The number of times that data had to be retrieved from disk for this process because it was not found in memory. This value is accumulated from the time the process is started.

NonePage faults/sec is the rate of page faults over time.

Page Faults Delta

The change in the number of page faults since the last update.

None

Paged Pool

The amount of system-allocated virtual memory, in kilobytes, used by a process. The paged pool is virtual memory available to be paged to disk. Paging is the moving of infrequently used parts of a program’s working memory from RAM to another storage medium, usually the hard disk. The paged pool includes all of user memory and a portion of system memory.

Pool Paged Bytes

Peak Memory Usage

The peak amount of physical memory resident in a process since it started.

None

PID (Process Identifier)

Numerical ID assigned to the process while it runs.

ID Process

Thread Count

The number of threads running in the process.

Thread Count

USER Objects

The number of USER objects currently being used by a process. A USER object is an object from Window Manager, which includes windows, menus, cursors, icons, hooks, accelerators, monitors, keyboard layouts, and other internal objects.

None

Virtual Memory Size

The amount of virtual memory, or address space, committed to a process.

Private Bytes