Обсуждение: pgsql: bufmgr: Return whether WaitReadBuffers() needed to wait
bufmgr: Return whether WaitReadBuffers() needed to wait Thanks to the previous commit, pgaio_wref_check_done() will now detect whether IO has completed even if userspace has not yet consumed the kernel completion. This knowledge can be useful for callers of WaitReadBuffers() to know whether it needed to wait or not, e.g. for adjusting read-ahead aggressiveness or for instrumentation. Reviewed-by: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com> Discussion: https://postgr.es/m/f3xxfrkafjxpyqxywcxricxgyizjirfceychyxsgn7bwjp5eda@kwbduhy7tfmu Discussion: https://postgr.es/m/CAH2-Wz%3DkMg3PNay96cHMT0LFwtxP-cQSRZTZzh1Cixxf8G%3Dzrw%40mail.gmail.com Discussion: https://postgr.es/m/a177a6dd-240b-455a-8f25-aca0b1c08c6e@vondra.me Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/513374a47a71d64ff5c4790b7f962d3a80e8cc7c Modified Files -------------- src/backend/storage/buffer/bufmgr.c | 17 ++++++++++++++++- src/include/storage/bufmgr.h | 2 +- 2 files changed, 17 insertions(+), 2 deletions(-)