We can use the following combination of commands to get the work done. Method-1: How to check Memory Utilization Percentage in Linux? It will be very useful for Linux Experts and Middle Level Linux Users. These format commands falls under Linux advanced commands. But the same time, you won’t be getting the clear utilization if you are using free -m or free -g. This tutorial will help you to identify the memory utilization when you are facing high memory utilization frequently in Linux server. If you want to know those information then you are in the right page. This is due to the alignment of top and provides much cleaner output: cut memory_raw -d',' -f3 | tee memory_used_withlabel.txtĬut memory_used_withlabel.txt -d' ' -f3 | tee memory_used.There are lot of commands and options available in Linux to check memory utilization but I don’t see much information to check about memory utilization percentage.Most of the times we are checking memory utilization alone and we won’t think about how much percentage is used. As we later found out, it is much faster to leave out the cut command during data acquisition, then perform the cut command on the output file later.Īlso, we had no need for timestamps in our tests.īegin Logging: top -bd 0.1 | grep 'KiB Mem' | tee memory_raw.txtĢ levels of cut (filtering), first by comma, then by space.
It does turn out that piping through cut cause MASSIVE delay in getting anything out to file. In my case I wanted to use top also because you can run memory stats faster than 1 second per capture, as you can see here I wanted to capture a stat every 1/10th of a second. The user can indeed modify the 0.1 to another number in order to run different capture sample rates.
The standard output from top when grep ing with Kib Mem is: KiB Mem : 16047368 total, 8708172 free, 6015720 used, 1323476 buff/cacheīy running this through cut, we filter down to literally just the number prior to used OR: top -bd 0.1 | grep 'KiB Mem' | cut -d' ' -f10 | tee memory.txt So here is the answer that I came up with: top -bd 0.1 | grep 'KiB Mem' | cut -d' ' -f10 > memory.txt all will seem to output without excess filtering.
So I know that I am late to this game, but I just came up with this answer, as I needed to do this, and really didn't want the extra fields that vmstat, free, etc.
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