Used suggested: valgrind -tool=massif -pages-as-heap=yes -massif-out-file=massif.out. Sorry, I am first time here and can only ask questions… 13:29:33: Running free memory monitor with threshold 30%. #!/usr/bin/env bashĮcho '$(date '+%Y-%m-%d %H:%M:%S'): Running free memory monitor with threshold $threshold%.'įreePercent=`free -m | grep Mem: | awk '') ))Įcho '$(date '+%Y-%m-%d %H:%M:%S'): Free memory $freePercent% is less than $threshold%'Įcho '$(date '+%Y-%m-%d %H:%M:%S'): Sufficient free memory available: $freePercent%' My use case: I wanted to monitor a linux machine which has less RAM and wanted to take a snapshot of per container usage when it runs under heavy usage. It reports lots of information about the installed RAM memory.Re-inventing the wheel, with hand made bash script. To find out hardware information about the installed RAM, use the demidecode command. Similar to the top command, the htop command also shows memory usage along with various other details. The buffer and cache information is present here too, like the free command. They indicate total, used and free amounts of the memory. Here is a sample outputĬheck the KiB Mem and KiB Swap lines on the header.

The header on output has the required information. However it also reports total memory usage and can be used to monitor the total RAM usage. The top command is generally used to check memory and cpu usage per process. The vmstat command with the s option, lays out the memory usage statistics much like the proc command. They indicate same values of memory usage as the free command. They are rather virtual files that contain dynamic information about the kernel and the system.Ĭheck the values of MemTotal, MemFree, Buffers, Cached, SwapTotal, SwapFree. Know that the /proc file system does not contain real files. The next way to check memory usage is to read the /proc/meminfo file. The free command is the most simple and easy to use command to check memory usage on linux. Just in case anyone found the title interesting enough: free -m

Track memory usage linux