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Perform only one ReadControlFile() during startup.

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Previously we read the control file in multiple places. But soon the
segment size will be configurable and stored in the control file, and
that needs to be available earlier than it currently is needed.

Instead of adding yet another place where it's read, refactor things
so there's a single processing of the control file during startup (in
EXEC_BACKEND that's every individual backend's startup).

Author: Andres Freund
Discussion: http://postgr.es/m/20170913092828.aozd3gvvmw67gmyc@alap3.anarazel.de
This commit is contained in:
Andres Freund
2017-09-13 02:12:17 -07:00
parent 0a480502b0
commit 8356753c21
4 changed files with 44 additions and 14 deletions
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src/include/access/xlog.h
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@@ -261,6 +261,7 @@ extern XLogRecPtr GetFakeLSNForUnloggedRel(void);
extern Size XLOGShmemSize(void);
extern void XLOGShmemInit(void);
extern void BootStrapXLOG(void);
extern void LocalProcessControlFile(void);
extern void StartupXLOG(void);
extern void ShutdownXLOG(int code, Datum arg);
extern void InitXLOGAccess(void);