How can I tell which process is using swap space?

How can I tell which process is using swap space?

The procedure to check swap space usage and size in Linux is as follows:

1. Open a terminal application.
2. To see swap size in Linux, type the command: swapon -s .
3. You can also refer to the /proc/swaps file to see swap areas in use on Linux.
4. Type free -m to see both your ram and your swap space usage in Linux.

How do you check swap usage on top?

For CentOS/RHEL 5 and 6

1. Run the TOP command: # top.
2. On your keyboard press the “f” key followed by “p” to add the Swap column, Hit enter.
3. Next, upper case “O” and finally “p” sort by swap, Hit enter.
4. Perform your review as needed and press “q” to exit top command.

What uses swap space?

Swap space is a space on a hard disk that is a substitute for physical memory. It is used as virtual memory which contains process memory images. Whenever our computer runs short of physical memory it uses its virtual memory and stores information in memory on disk.

How do you sort processes by swap usage in the top?

However, once top is opened, you can sort by SWAP usage as follows:

1. Type f to open the “Add column” menu.
2. Use the up/down arrow keys to navigate to SWAP.
3. Type d or to select SWAP for display.
4. Tap the right arrow to select the SWAP column to reorder.
5. Type s to select SWAP as your sort column.

How do I check my VM Swappiness?

You can view the swappiness value of your system using the sysctl command.

1. sudo sysctl vm.swappiness.
2. apt-get install procps.
3. sudo sysctl vm.swappiness=10.

How do I know if swap is enabled?

4 Answers

1. cat /proc/meminfo to see total swap, and free swap (all linux)
2. cat /proc/swaps to see which swap devices are being used (all linux)
3. swapon -s to see swap devices and sizes (where swapon is installed)
4. vmstat for current virtual memory statistics.

How do I allocate swap space in Linux?

Adding Swap Space on a Linux System

1. Become a superuser (root) by typing: \% su Password: root-password.
2. Create a file in a selected directory to add swap space by typing: dd if=/dev/zero of=/ dir / myswapfile bs=1024 count =number_blocks_needed.
3. Verify that the file was created by typing: ls -l / dir / myswapfile.

How do you define swap space in Linux?

How does swap space management work in secondary storage structure?

The swap spaces are placed on the disk so the load which is on the I/O by the paging and swapping will spread over the system’s bandwidth. Let, if the swap-space is simply a large file within the file system. To create it, name it and allocate its space normal file-system routines can be used.

How do I change the swap space in Linux?

The basic steps to take are simple:

1. Turn off the existing swap space.
2. Create a new swap partition of the desired size.
3. Reread the partition table.
4. Configure the partition as swap space.
5. Add the new partition/etc/fstab.
6. Turn on swap.

How do you calculate swappiness?

How to identify and print processes using swap space in Linux?

Identify and print processes using swap space to get a better understanding of the Linux operating system. Use the following command to simply display processes using swap space. This list will be sorted by process id by default due to a way find command returns its results, which are parsed by awk utility.

How to get the size of used swap space of process?

Run top then press O p Enter. Now processes should be sorted by their swap usage. Here is an update as my original answer does not provide an exact answer to the problem as pointed out in the comments. From the htop FAQ: It is not possible to get the exact size of used swap space of a process.

How to list all processes that are using swap?

On the /proc/’processPID’/status you can find that information on the field VmSwap. With this command you can list all process that are using swap.

How do I find out what swap is being used?

Finding out process ID and swap usage. Type the following pidof command to find the process ID of a running program called memcached: Alternatively, use pgrep command to lookup process PID, enter: Sample outputs (note down PID number #1): To see swap space used by memcached (PID # 48440), enter (number #2):