What is the use of vmstat in tuning?

What is the use of vmstat in tuning?

Use the vmstat ( vm_stat on Mac OS X) or sar command to monitor paging. The following table lists the important columns from the output of these commands. Indicates the number of address translation page faults. Address translation faults occur when a process refers to a valid page not in memory.

How use iostat command in Linux?

Note: 10 Linux iostat Command to Report CPU and I/O Statistics are listed below:

1. iostat: Get report and statistic.
2. iostat -x: Show more details statistics information.
3. iostat -c: Show only the cpu statistic.
4. iostat -d: Display only the device report.
5. iostat -xd: Show extended I/O statistic for device only.

What is the purpose of the iostat command?

The iostat command is used to monitor system input/output (I/O) devices (physical and logical) that are loaded, by observing the time for which these devices are active. The iostat command also generates reports that can be used to change system configuration to better balance the I/O load between file systems, physical volumes, and adapters.

How to generate report and statistics with iostat?

To generate report and statistics with the iostat command use : In the output there are two types of reports. The first one is the CPU utilization report. The second one is the Device utilization report. Let’s try and understand the different fields in the output. 1. CPU Utilization Report The CPU Utilization report has the following fields :

How to display disk utilization information ( iostat )?

$ iostat 5tty fd0 sd3 nfs1 nfs31 cpu tin tout kps tps serv kps tps serv kps tps serv kps tps serv us sy wt id 0 1 0 0 410 3 0 29 0 0 9 3 0 47 4 2 0 94 The first line of output shows the statistics since the last time the system was booted.

How to convert iostat to kilobytes in Linux?

By default, iostat measure the I/O system with the bytes unit. To make it easier to read, we can convert the iostat to show us reports in kilobytes or megabytes unit. 7) iostat -m Command: Used to create a report with megabytes unit.