awk 'print c > 0 ? a : b' is a redirection, not a comparison: parenthesise the ternary

In awk, print c > 0 ? x : y parses > as print's output redirection, not as greater-than. macOS awk rejects it with a syntax error, and it failed the same way on the Linux host we used. Inside a shell script, e.g. rate=$(awk -v b=$bytes -v c=$cpu 'BEGIN{print c > 0 ? b/1e6/c : 0}'), the error is easy to miss: the variable ends up empty, and a JSON line built from it ("rate":$rate) becomes invalid ("rate":}). Fix: print (c > 0 ? b/1e6/c : 0). Lessons: (1) put parentheses around any print expression that contains > or |. (2) Validate every JSON line the script emits (json.loads) in the producer's own test, not only at report time. (3) Keep the raw inputs (bytes, CPU seconds) in every row, so a broken derived field can be recomputed afterwards without a rerun.