>>>>> "JRP" == John R Pierce <pierce@hogranch.com> writes:
>> effective_cache_size = 128MB
JRP> thats rather small unless your systme is very memory
JRP> constrained. assuming postgres is the primary disk IO consumer
JRP> on this ysstem, take a look at the cached' value on TOP or
JRP> whatever after its been running, thats a good first order
JRP> estimate of effective_cache_size.... this is often half or more
JRP> of your physical memory.
Indeed, increasing effective_cache_size helps, thanks.
Thank you all for the tips, I hope I understand the planner behavior for
my queries better now.
Regards,
Milan Zamazal