Hi Vladimir, Thanks for these reports. On 2016-06-13 00:42:19 +0300, Vladimir Borodin wrote: > perf report -g -i pg9?_all.data >/tmp/pg9?_perf_report.txt Any chance you could redo the reports with --no-children --call-graph=fractal added? The mode that includes child overheads unfortunately makes the output hard to interpet/compare. > The results from pg9?_perf_report.txt are attached. Note that in all cases some events were lost, i.e.: > > root@pgload05g ~ # perf report -g -i pg94_all.data >/tmp/pg94_perf_report.txt > Failed to open [vsyscall], continuing without symbols > Warning: > Processed 537137 events and lost 7846 chunks! You can reduce the overhead by reducing the sampling frequency, e.g. by specifying -F 300. Greetings, Andres Freund -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
