shm_mq: Have the receiver set the sender's less frequently. Instead of marking data from the ringer buffer consumed and setting the sender's latch for every message, do it only when the amount of data we can consume is at least 1/4 of the size of the ring buffer, or when no data remains in the ring buffer. This is dramatically faster in my testing; apparently, the savings from sending signals less frequently outweighs the benefit of letting the sender know about available buffer space sooner.
Patch by me, reviewed by Andres Freund and tested by Rafia Sabih. Discussion: http://postgr.es/m/ca+tgmoyk7rfj6r7klefsgtyzci3zqtrhaz8mcsdbuajemlo...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/497171d3e2aaeea3b30d710b4e368645ad07ae43 Modified Files -------------- src/backend/storage/ipc/shm_mq.c | 70 +++++++++++++++++++++++++--------------- 1 file changed, 44 insertions(+), 26 deletions(-)
