Nicola Contu <nicola.contu@xxxxxxxxx> writes: > See attached perf report. The difference seems to be all in this line, but > not sure : > + 26.80% 0.00% 222 postmaster [kernel.kallsyms] > [k] system_call_fastpath That would suggest that many more kernel calls are happening, which is something you could usefully investigate with strace, perhaps. regards, tom lane