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tech:linux:memory_usage [2014/11/15 09:13] (current) |
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| + | ====== Find Memory Usage ====== | ||
| + | ===== System memory used and free ===== | ||
| + | Total Used and Free Memory in MBytes (in that order) | ||
| + | <code> | ||
| + | free -m|grep "buffers/cache"|cut -d":" -f2 | ||
| + | </code> | ||
| + | |||
| + | ===== Memory by Process ===== | ||
| + | Raw | ||
| + | <code> | ||
| + | ps -e -orss=,args= | sort -b -k1,1n | pr -TW$COLUMNS | ||
| + | </code> | ||
| + | Human readable | ||
| + | <code> | ||
| + | ps -e -orss=,args= | sort -b -k1,1n | awk '{ split( "KB MB GB" , v ); s=1; while( $1>1024 ){ $1/=1024; s++ } print int($1) " " v[s] " " $2 }' | ||
| + | </code> | ||
| + | |||
| + | ===== Memory by Process - Grouped together ===== | ||
| + | Raw | ||
| + | <code> | ||
| + | ps -e -orss=,args= | awk '{arr[$2]+=$1} END {for (i in arr) {print arr[i],i}}' | sort -b -k1,1n | ||
| + | </code> | ||
| + | Human readable | ||
| + | <code> | ||
| + | ps -e -orss=,args= | awk '{arr[$2]+=$1} END {for (i in arr) {print arr[i],i}}' | sort -b -k1,1n | awk '{ split( "KB MB GB" , v ); s=1; while( $1>1024 ){ $1/=1024; s++ } print int($1) " " v[s] " " $2 }' | ||
| + | </code> | ||
| + | |||
| + | ===== Total RSS Memory ===== | ||
| + | <code> | ||
| + | ps -e -orss= | awk '{ sum += $1 } END { print sum }' | ||
| + | </code> | ||
| + | Human redable | ||
| + | <code> | ||
| + | ps -e -orss= | awk '{ sum += $1 } END { print sum }' | awk '{ split( "KB MB GB" , v ); s=1; while( $1>1024 ){ $1/=1024; s++ } print int($1) " " v[s] " " $2 }' | ||
| + | </code> | ||
| + | |||
| + | ===== Total Memory ===== | ||
| + | <code> | ||
| + | smem -w -t -k | ||
| + | </code> | ||
| + | |||
| + | ===== Related ===== | ||
| + | Use ''lshw'' - for listing hardware including physical memory slots | ||
