Tsirkin Evgeny <tsurkin@xxxxxxxxxxxxxx> writes: > Today i was trying to run an old ver. of an application on test server . > After a while i have got the pg hangs : It looks like someone is holding a critical LWLock --- hard to tell if it's the BufMgrLock or a per-buffer lock for a system index's metapage, but must be one or the other. Try backtracing the processes that *aren't* hung in this particular way. I'm not sure you'll be able to learn anything much given that the build doesn't have debug info, but you might as well try. regards, tom lane
