On Fri, Jul 09, 2021 at 09:24:19PM +0530, Bharath Rupireddy wrote: > I've always had a hard time distinguishing various types of > processes/terms used in postgres. I look at the source code every time > to understand them, yet I don't feel satisfied with my understanding. > I request any hacker (having a better idea than me) to help me with > what each different process does and how they are different from each > other? Of course, I'm clear with normal backends (user sessions), bg > workers, but the others need a bit more understanding.
It sounds like something that should be in the glossary, which currently refers to but doesn't define "auxiliary processes". * Background writer, checkpointer, WAL writer and archiver run during normal * operation. Startup process and WAL receiver also consume 2 slots, but WAL * writer is launched only after startup has exited, so we only need 5 slots. */ #define NUM_AUXILIARY_PROCS 5 Bootstrap is run by initdb: src/bin/initdb/initdb.c: "\"%s\" --boot -x0 %s %s " Standalone backend is run by --single, right ? -- Justin
