Greetings, * Laurenz Albe (laurenz.a...@cybertec.at) wrote: > On Fri, 2021-12-10 at 10:20 -0500, Tom Lane wrote: > > Jeff Janes <jeff.ja...@gmail.com> writes: > > > Can we change the default setting of track_io_timing to on? > > > > That adds a very significant amount of overhead on some platforms > > (gettimeofday is not cheap if it requires a kernel call). And I > > doubt the claim that the average Postgres user needs this, and > > doubt even more that they need it on all the time. > > So I'm -1 on the idea. > > I set "track_io_timing" to "on" all the time, same as "log_lock_waits", > so I'd want them both on by default.
Same. I'd also push back and ask what modern platforms still require a kernel call for gettimeofday, and are we really doing ourselves a favor by holding back on enabling this by default due to those? If it's such an issue, could we figure out a way to have an 'auto' option where we detect if the platform has such an issue and disable in that case, but enable otherwise? Thanks, Stephen
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