How to Check Which Process Is Using Swap in Linux

There are many ways to know about the processes that are making use of swap space the most basic approach is to use the top command and then press f scroll down to where it says SWAP press space followed by typing q. The total was within 17-22 of the cache usage reported by free minus swapcache.

8 Useful Commands To Monitor Swap Space Usage In Linux

How can I know which process is using my swap space on my Linux system.

. Check swap usage size and utilization in Linux. Swap space is not necessarily used by specific processes. Sudo apt-get install smem On other Linux distributions like Fedora RHEL CentOS SLES etc you can download the compiled binary from.

Files stored on tmpfs based file systems might be using them tmpfs first uses RAM as back-end but not to waste RAM can paginate out to the swap area blocks that. You can use the. To see swap size in Linux type the command.

Using procswaps file. Mkswap devsdb1 swapon devsdb1 free -m. Red Hat Enterprise Linux 5 update 3 2618-128el5 and newer Red Hat Enterprise Linux 6.

We will be sorting ps output with RSS values. Where are consumed each of those 244 MB of swap. To see the swap top process your have to press p to select the swap option and then press Enter.

1078 total swap space this shows that the swap is on Question. Run the TOP command. Open a terminal application.

On your keyboard press the f key followed by p to add the Swap column Hit enter. The SWAP column in top is pretty much useless and in any case does not represent use of swap space nor anything with significant correlation with use of swap space. Hit d to dot swap so it will be seen.

Smem Memory Reporting Tool. I would expect the information in procsmaps to include complete and accurate detail on the actual use of swap space. For example for sorting processes with the swap usage from larger run a script below.

How do I check which process is using swap space on my system. Red Hat Enterprise Linux 8. I did write the changes.

Top natively shows this information by using this formula. Also note that you are using -t - thus the shown value in your example is not the one of an oracle process but the aggregate value of all processes running under user oracle. You can also refer to the procswaps file to see swap areas in use on Linux.

Another way is to view the content of the process file procswaps for the current swap config. The procedure to check swap space usage and size in Linux is as follows. Next upper case O and finally p sort by swap Hit enter.

I did not change the type LINUX SWAP 82 in fdisk. These values show how much memory from physical RAM allocated to a particular process. System is utilising swap heavily and need to determine which processes are swapping.

This outputs the same content as we saw in previous command swapon -s. Use the down arrow to go down to the word swap. It does not include swapped out memory numbers.

I just ran a couple of tests and extracted the swap numbers for all tasks listed in procsmaps. This indicates the total usage of the swap space as one value. Adjust your cache sizes so swap never happens but short of that you want to utilise all available physical memory.

You want to find processes hogging on memory. Raw VIRT SWAP RES or equal SWAP VIRT - RES. Perform your review as needed and press q to exit top command.

If you would prefer a standard utility to check on swap usage install smem. Find proc -maxdepth 2 -path proc 0-9status -readable -exec awk -v FS process 12sub tprocess 1 END if process VmSwap. We have top utility which can be used as the first tool to get the swap utilisation value per process.

You can also see that the squid process is using 100 kB or swap space. With the -h switch the free command displays the memory and swap utilization in nearest possible 3 digit format. When using the.

You can check the size and current usage of swap space by running the command. By default top does not shows the SWAP utilisation so you will need to add additional field SWAP which will then show this value. Those swap reservations anonymous memory and mapped files are part of the virtual memory system of Solaris.

Red Hat Enterprise Linux 7. Free -m. Now that we have select to sort according the swap usage the following window will be showed with the TOP process using the swap memory.

If swap usage continues to grow steadily or is already large then one of the following choices may need to be considered. Without the use of any switch the displayed output is printed in kilobytes. Red Hat Enterprise Linux 9.

Type free -m to see both your ram and your swap space usage in Linux. Hit s to sort by swap. 1023 total swap space created default partition devsdb1 50M using fdisk.

This is a fork by Debian Fedora and openSUSE. Use the f key to see the fields use the arrow keys to go to SWAP and use s to set the sort then q. IF you hit swap thats a tuning failure.

This column does not exist in procPIDstatus with kernel 2639. If you try to double-guess it by using swap memory youre just impairing mysqls ability to decide what needs to be cached and what doesnt. 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. RSS is Resident Set Size. On Debian or Ubuntu install it using apt-get.

So it would appear the new numbers exposed via smaps do indeed indicate actual disk swap usage on a per process basis. Use the left arrow to deselect swap. Use the up arrow to place it where you want it to be viewed.

In fact swapon reads this file to print a summary. This command is used to check memory and swap utilization on your system in a few lines. To find that we will be using the sort function of process status ps command in this article.

I put it between cpu and mem. It is easier to check the swap usage of a specific process just check VmSwap column in procPIDstatus. If you would still like to do a sort on the SWAP column.

Grep SwapTotal procmeminfo Swap usage may slowly increase as shown above but should stop at some point. Use the right arrow to select swap so you can move it up. Though it is recommended to either make use of shell script or use Linux utilities like smem.

Key you can see the actual program name and version procps-ng being the latest version.

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