Turns out that awk's indexes are documented to start from 1;
So what happens if you use 0? Apparently it's undefined behavior, so
substr(var, 0, 5);
and
substr(var, 1, 5);
May or may not actually do the same thing. In Debian 6, the former
doesn't quite work, and actually returns something like substr(var, 1, 4),
which broke section()'s output.
- Redirect STDERR for the collection part in both tools
- rm_tempdir in sigtrap
- A part of pt-mysql-summary still depended on the system being run,
rather than the samples being read. Now it works properly.