On Tue, Dec 21, 2021 at 12:33:06AM -0500, Tom Lane wrote: > So now we have a real mystery about what is happening on Lars' > system. Those numbers can't be right. I realized Lars said it was x86_64/Linux, but I'm hoping to hear back with more details: What OS version? Is it a VM of some type ? How did you install postgres? From a package or compiled from source? grep -r HAVE_CLOCK_GETTIME /usr/pgsql-13/include Send the exact command and output you used to run the query? Why does your explain output have IO timing but not Buffers: hit/read ? -- Justin
