Takahiro Itagaki <itagaki.takahiro@oss.ntt.co.jp> writes:
> Greg Smith <greg@2ndquadrant.com> wrote:
>> It looks like the switch between clients running on separate workers can
>> lead to a mix of their respective lines showing up though.
> Oops. There might be two solutions for the issue:
> 1. Use explicit locks. The lock primitive will be pthread_mutex for
> multi-threaded implementations or semaphore for multi-threaded ones.
> 2. Use per-thread log files.
> File names would be "pgbench_log.<main-process-id>.<thread-id>".
I think #1 is out of the question, as the synchronization overhead will
do serious damage to the whole point of having a multithreaded pgbench.
#2 might be a reasonable idea.
regards, tom lane
