What is Topas command in AIX?

The topas command collects a set of metrics from AIX® partitions that are running on the same hardware platform. Dedicated and shared partitions are displayed, and a set of aggregated values provide an overview of the entire hardware systems partition set.

What is Topas command?

Description. The topas command reports selected statistics about the activity on the local system. The command uses the curses library to display its output in a format suitable for viewing on an 80×25 character-based display or in a window of at least the same size on a graphical display.

How do I check my CPU usage in Topas?

Check what all application related processes are running and which all are utilizing more CPU by running the TOPAS command. Topas command will give you the CPU usage for each process. There are many different topas commands which system admin can use to check CPU usage. This will show memory usage for each command.

How do I check my memory in Topas?

If you want to get the highest virtual memory processes on your system, you can use #svmon -P. The output of topas shows us the memory as Computational percentage, which is the Virtual memory. The screenshot shows us that the Computational percentage is 21%, this means that the system is not memory over-committed.

What is NMON report Linux?

Nigel’s Monitor ( nmon ) is a system performance monitoring tool originally developed by IBM for the AIX operating system and later ported for Linux on several CPU architectures.

How do I find CPU usage in AIX?

Just type one command sar -u 1 10 for check utilization.

How do I check memory on AIX?

On AIX you can use a combination of the commands lsdev and lsattr to determine how much memory the computer has. These commands (located in /usr/sbin) are used to display the system devices and their attributes.

What is Computational memory in AIX?

Memory in AIX is managed by VMM, Virtual Memory Manager, that works with pages, a fixed-size block of data. There are fundamentally two types of pages on AIX: Working storage pages (Computational memory) Permanent storage pages (Non-Computational memory)

What does nmon stand for?

nmon (Ngel’s Monitor) is a computer performance system monitor tool for the AIX and Linux operating systems.

How do you run nmon?

To run the nmon tool, simply type in nmon and hit the Enter key to see the nmon tool interface on your terminal. As you can see in the above snapshot, to view different statistics, all you have to do is press the specific key for any statisctics and that will get added to the nmon tool interface.

How do I view nmon logs?

You can view these files directly by opening them or with post-processing tools such as nmon analyzer. The nmon tool disconnects from the shell during the recording so that the command continues running even if you log out. Then run the nmon command.

How do I start nmon?

If you’re using a distribution that uses dnf (Redhat, Fedora, CentOS, etc.), the following steps will install nmon:

1. Open up your terminal window.
2. Issue the command dnf install epel-release.
3. Install nmon with the command dnf install nmon.
4. Allow the installation to complete.

How do I check CPU and memory in AIX?

AIX Custom Monitoring for CPU, Memory and Disk – Perl Script

1. CPU Usage. Command: lparstat. Output: Total CPU, Free CPU, Used CPU, CPU Usage Ratio.
2. Computational Memory Usage: Command: vmstat -v.
3. Disk Space Usage: Command: df -g.
4. Paging Activity: Command: vmstat -w.

What is logical CPU in AIX?

Logical processor Represents an individual Simultaneous Multi-threading SMT thread of a physical processor. Equals the total number of cores assigned multiplied by SMT: lcpu = vCPU * SMT. Hypervisor virtual processor core corresponds to one AIX logical processor when SMT is disabled.

Why does Aix MPIO leave one path to the device?

This scenario indicates that operations that are sent on this MPIO disk path are failing, but AIX MPIO has not marked the path as Failed. In some cases, AIX MPIO leaves one path to the device in Enabled state, even when all MPIO disk paths are experiencing errors.

What is multipath I/O (MPIO)?

Using multiple paths to access a storage device is referred to as multipath I/O (MPIO). The IBM® AIX® operating system has supported MPIO for many years. IBM frequently updates the MPIO features of AIX to assist clients using increasingly complex SAN configurations.

How many MPIO paths should you configure?

It is important to note that MPIO does support many more paths than 8 or 16, but from a design and functional perspective, four to eight paths have been proven to be the most effective. Businesses that need to configure more than eight paths per LUN need to carefully consider the following details:

What is an active MPIO disk path?

Indicates that the MPIO disk path is an active path on a device that has active and passive controllers. The PCM selects active MPIO disk paths for I/O operations on such a device.

How to check memory utilization by process in aix?

For memory information, we use the command svmon. svmon shows the total usage of physical and paging memory.

What is using paging space AIX?

AIX® uses virtual memory to address more memory than is physically available in the system. The management of memory pages in RAM or on disk is handled by the Virtual Memory Manager (VMM). Virtual-memory segments are partitioned in units called pages.

What is swap memory in AIX?

A swap space is nothing but a type of logical volume with allocated disk space that stores information which is resident in virtual memory but is not currently being accessed under AIX operating systems.

What is Numperm?

numperm (lru_file_repage) The number of non-computational pages is referred to as numperm: The vmstat -v command displays the numperm value for a system as a percentage of a system’s real memory.

How do I save my nmon data?

Use the -f option to save nmon data to a file in Comma separated value format. Then use the nmon analyser Excel spreadsheet to load and graph the data.