Hi, I have created a shared hash table in partitioned mode inside the postgres server code. In order to guard the partitions, I'm trying to initialize an array of LWLocks. The code that I'm trying to use for that is
void RequestNamedLWLockTranche <https://doxygen.postgresql.org/lwlock_8h.html#a77298cebf29062e88e529beb3851219b> (const char *tranche_name, int num_lwlocks); LWLockPadded <https://doxygen.postgresql.org/unionLWLockPadded.html> * GetNamedLWLockTranche <https://doxygen.postgresql.org/lwlock_8h.html#a15c956090fa42be94e075a1cf6bdfd8e> (const char *tranche_name); I'm not sure where exactly should this code be called from the server code. So I had placed it in void CreateSharedMemoryAndSemaphores(bool makePrivate, int port); within ipic.c. However, I'm getting the following error message when starting the database: FATAL: requested tranche is not registered So at this point, I'm a little confused as to where the methods should be called from inside the server code. Any pointers would be appreciated. Thanks, -SB PS: I saw that that are two variables controlling access to RequestNamedLWLockTranche <https://doxygen.postgresql.org/lwlock_8h.html#a77298cebf29062e88e529beb3851219b> () if (IsUnderPostmaster <https://doxygen.postgresql.org/globals_8c.html#a6e9dda2cdd786e5cba0d83b2deb577ec> || !lock_named_request_allowed <https://doxygen.postgresql.org/lwlock_8c.html#aa9d4ba31a9dbab8fee08d6f0f649eb64> ) return; /* too late */ which implies that IsUnderPostmaster must be false and lock_named_request_allowed should be true. Thus, I had invoked RequestNamedLWLockTranche <https://doxygen.postgresql.org/lwlock_8h.html#a77298cebf29062e88e529beb3851219b> before the first call to LWLockShmemSize <https://doxygen.postgresql.org/lwlock_8c.html#af312a0706333345e2be792a7718b6c43> which sets lock_named_request_allowed = true and GetNamedLWLockTranche <https://doxygen.postgresql.org/lwlock_8h.html#a15c956090fa42be94e075a1cf6bdfd8e> later. This works in the single user mode but fails when I start the server explicitly through postgres -D ...
