Richard Huxton <dev@xxxxxxxxxxxx> writes: > surabhi.ahuja wrote: >> so does this mean that someone is trying to stop postmaster by >> sending it a kill signal? > Someone or something. It can be Linux's out-of-memory facility picking > processes to kill. Google "oom killer" for discussion. No, because the OOM killer invariably uses "kill -9". "Fast shutdown" means that something sent the postmaster a SIGINT. If you launch the postmaster manually and are not careful to make it dissociate from your terminal, then typing ^C at some unrelated program later would be enough to make this happen ... >> 1. many times i have seen two instances of postmaster running. how >> does that happen and how to prevent it from happening? > Shouldn't (unless you have two installations of course). Perhaps he's not understanding the difference between the postmaster and its child processes? I don't believe he's actually got two postmasters running (unless maybe in separate directories with separate ports, which is hardly likely to be a setup one would create by accident). There are *very* extensive safety interlocks in place to prevent that. regards, tom lane
