Shell one-liner to create a histogram from a log file.

DojoS2E6.sh

export COL=$COLUMNS; awk -F '[ ()]|ms' '/\[CatalogItem\] Retrieved/ { c[int($8 / $6 / 100) * 100 + 50] += $6 } END { for(l in c) { print l, c[l] } }' production.log | awk 'BEGIN { max = 0 } { if($2 > max) max = $2; c[$1] = $2 } END { for(l in c) { printf("%5d %d\n", l, c[l] / max * (ENVIRON["COL"] - 7)) } }' | awk '{ r = ""; s = $2; while(s-- > 0) { r = r "#" }; printf("%6d %s\n", $1, r); }' | sort -n