Hi, I'm learning how to use the "background worker processes" commited in 9.3. The usage basics are quite nicely illustrated in the worker_spi extension (kudos to those who designed the feature / extension).
I'm not quite sure how to pass data between the regular backend and a worker. Implementing the channel (socket/pipe/...) itself is not a big deal, that's IPC 101, but deciding which data to copy (and how) is. Say I need to forward a tuple to the worker process - e.g. from a nodeAgg node, so that the worker can build the hash table. Is there something (a rule of a thumb, method, ...) that would help me to identify the pieces of data that need to be copied? Or do I need to do the go through the objects and decide what to copy and how on my own? regards Tomas -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
