The PostgreSQL service stops unexpectedly, and needs to be restarted. It is a very crucial situation when all the client systems to be restarted. Mostly this happens in the middle of a data entry and all the entered data is lost.
A) 9.2.0 is an old release, it should be updated to 9.2.7 (this update should just require restarting postgres)
B) I'd look in postgres' logfiles, likely in the pg_log subdirectory under the data directory, to see what event caused this crash.
