Hey there,
I am trying to understand why psql process is taking 45 seconds to connect
to the local server when using real IP address, when using the localhost is
0.5 seconds.
Basically I would like to get a printout of the slowest system calls that
occurred while I was running the process, matched by execname == "psql".
My dtrace is very rusty, so here is what I go so far, but I don't think
it's doing what I want (: Any hints appreciated!
#pragma D option quiet
> cat syscalls-all.d
#pragma D option quiet
BEGIN
{
start = timestamp;
}
syscall:::entry
/execname == "psql"/
{
@syscalls[probefunc] = count();
self->start = timestamp;
}
syscall:::return
/self->start/
{
@latency[probefunc] = avg(timestamp - self->start);
self->start = 0;
}
END
{
this->seconds = (timestamp - start) / 1000000000;
printf("Ran for %d seconds.\n", this->seconds);
printf("Per-second rate:\n");
normalize(@syscalls, this->seconds);
printa(@syscalls);
printa(@latency);
}
--
Regards,
Konstantin
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