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Get php memory usage stats (column 5) from nginx logs
cat /var/log/php.access.log| awk '{print $6}' | sort -n | awk ' BEGIN { c = 0; sum = 0; min = 0; max =0 } {c++; a[c] = $1; sum += $1;} END { ave = sum / c; if( (c % 2) == 1 ) { median = a[ int(c/2) ]; } else { median = ( a[c/2] + a[c/2-1] ) / 2; min=a[0]; max = a[c-1]; } OFS="\t"; print "Count", "Average", "Median", "Min", "Max"; print c, ave, median, min, max; }'
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