Re: Ragged latency log data in multi-threaded pgbench

Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp> wrote:

> > >   2. Use per-thread log files.
> > >      File names would be "pgbench_log.<main-process-id>.<thread-id>".

Here is a patch to implement per-thread log files for pgbench -l.

The log filenames are "pgbench_log.<main-process-id>.<thread-serial-number>"
for each thread, but the first thread (including single-threaded) still uses
"pgbench_log.<main-process-id>" for the name because of compatibility.

Example:
  $ pgbench -c16 -j4 -l
  $ ls
  pgbench_log.2196  pgbench_log.2196.1  pgbench_log.2196.2  pgbench_log.2196.3

Comments and suggenstions welcome.

Regards,
---
Takahiro Itagaki
NTT Open Source Software Center