Hi,
On 2022-02-03 14:35:10 +0900, Masahiko Sawada wrote:
> Yes, but if we use shmem IPC, we need to allocate shared memory for
> them based on the number of subscriptions, not logical replication
> workers (i.e., max_logical_replication_workers). So we cannot estimate
> memory in the beginning. Also, IIUC the number of subscriptions that
> are concurrently working is limited by max_replication_slots (see
> ReplicationStateCtl) but I think we need to remember the state of
> disabled subscriptions too.
Use dshash (i.e. dsm) with a small initial allocation in non-dynamic shared
memory...
Greetings,
Andres Freund