Bhushan Pathak <bhushan(dot)pathak02(at)gmail(dot)com> writes:
> In 9.1.3, this usage was upto 25MB with the same load on the same server.
> With 9.2.4 it has jumped upto ~580 MB. We are monitoring the RES column
> from top output to get the memory usage.
On most versions of "top", examining RES alone gives a completely
misleading impression of what's happening. RES minus SHR is a better
estimate of what the process has really consumed. I don't know why the
behavior changed from 9.1 to 9.2, but this measurement alone is not
evidence that you have an actual problem.
regards, tom lane