Обсуждение: pgsql: Provide multi-block smgrprefetch().
Provide multi-block smgrprefetch(). Previously smgrprefetch() could issue POSIX_FADV_WILLNEED advice for a single block at a time. Add an nblocks argument so that we can do the same for a range of blocks. This usually produces a single system call, but might need to loop if it crosses a segment boundary. Initially it is only called with nblocks == 1, but proposed patches will make wider calls. Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi> (earlier version) Discussion: https://postgr.es/m/CA+hUKGJkOiOCa+mag4BF+zHo7qo=o9CFheB8=g6uT5TUm2gkvA@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/b485ad7f07c80efbfd47329f138f0fe3a5acf013 Modified Files -------------- src/backend/storage/buffer/bufmgr.c | 2 +- src/backend/storage/buffer/localbuf.c | 2 +- src/backend/storage/smgr/md.c | 37 +++++++++++++++++++++++++---------- src/backend/storage/smgr/smgr.c | 7 ++++--- src/include/storage/md.h | 2 +- src/include/storage/smgr.h | 2 +- 6 files changed, 35 insertions(+), 17 deletions(-)