Fujii Masao d75288fb27 Make archiver process an auxiliary process. ... This commit changes WAL archiver process so that it's treated as an auxiliary process and can use shared memory. This is an infrastructure patch required for upcoming shared-memory based stats collector patch series. These patch series basically need any processes including archiver that can report the statistics to access to shared memory. Since this patch itself is useful to simplify the code and when users monitor the status of archiver, it's committed separately in advance. This commit simplifies the code for WAL archiving. For example, previously backends need to signal to archiver via postmaster when they notify archiver that there are some WAL files to archive. On the other hand, this commit removes that signal to postmaster and enables backends to notify archier directly using shared latch. Also, as the side of this change, the information about archiver process becomes viewable at pg_stat_activity view. Author: Kyotaro Horiguchi Reviewed-by: Andres Freund, Álvaro Herrera, Julien Rouhaud, Tomas Vondra, Arthur Zakirov, Fujii Masao Discussion: https://postgr.es/m/20180629.173418.190173462.horiguchi.kyotaro@lab.ntt.co.jp		2021-03-15 13:13:14 +09:00
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src	Make archiver process an auxiliary process.	2021-03-15 13:13:14 +09:00
KNOWN_BUGS
Makefile	Remove maintainer-check target, fold into normal build	2013-10-10 20:11:56 -04:00
MISSING_FEATURES
TODO	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00