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Andres Freund 755a4c10d1 bufmgr/smgr: Don't cross segment boundaries in StartReadBuffers() ... With real AIO it doesn't make sense to cross segment boundaries with one IO. Add smgrmaxcombine() to allow upper layers to query which buffers can be merged. We could continue to cross segment boundaries when not using AIO, but it doesn't really make sense, because md.c will never be able to perform the read across the segment boundary in one system call. Which means we'll mark more buffers as undergoing IO than really makes sense - if another backend desires to read the same blocks, it'll be blocked longer than necessary. So it seems better to just never cross the boundary. Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi> Reviewed-by: Noah Misch <noah@leadboat.com> Discussion: https://postgr.es/m/1f6b50a7-38ef-4d87-8246-786d39f46ab9@iki.fi		1 year ago
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aio	Allow ReadStream to be consumed as raw block numbers.	1 year ago
buffer	bufmgr/smgr: Don't cross segment boundaries in StartReadBuffers()	1 year ago
file	Unify some error messages to ease work of translators	1 year ago
freespace	freespace: Don't return blocks past the end of the main fork.	2 years ago
ipc	Use an shmem_exit callback to remove backend from PMChildFlags on exit	1 year ago
large_object	Deduplicate code in LargeObjectExists and myLargeObjectExists.	1 year ago
lmgr	Use an shmem_exit callback to remove backend from PMChildFlags on exit	1 year ago
page	Update copyright for 2024	2 years ago
smgr	bufmgr/smgr: Don't cross segment boundaries in StartReadBuffers()	1 year ago
sync	Make the order of the header file includes consistent	2 years ago
Makefile	Provide API for streaming relation data.	2 years ago
meson.build	Provide API for streaming relation data.	2 years ago