with other auxiliary processes for a short period. As witnessed by
buildfarm member dungbeetle.
/*
* We set aside some extra PGPROC structures for auxiliary processes,
* ie things that aren't full-fledged backends but need shmem access.
+ *
+ * Background writer, WAL writer, and autovacuum launcher run during
+ * normal operation. When recovery has just finished, the startup
+ * process can co-exist with them for a brief period before it exits.
*/
-#define NUM_AUXILIARY_PROCS 3
+#define NUM_AUXILIARY_PROCS 4
/* configurable options */