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Treat a WAL sender process that hasn't started streaming yet as a regular

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backend, as far as the postmaster shutdown logic is concerned. That means,
fast shutdown will wait for WAL sender processes to exit before signaling
bgwriter to finish. This avoids race conditions between a base backup stopping
or starting, and bgwriter writing the shutdown checkpoint WAL record. We don't
want e.g the end-of-backup WAL record to be written after the shutdown
checkpoint.
This commit is contained in:
Heikki Linnakangas
2011-01-15 16:27:40 +02:00
parent fcd810c69a
commit 8f5d65e916
3 changed files with 32 additions and 2 deletions
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src/include/storage/pmsignal.h
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@@ -48,6 +48,7 @@ extern bool ReleasePostmasterChildSlot(int slot);
extern bool IsPostmasterChildWalSender(int slot);
extern void MarkPostmasterChildActive(void);
extern void MarkPostmasterChildInactive(void);
extern void MarkPostmasterChildWalSender(void);
extern bool PostmasterIsAlive(bool amDirectChild);
#endif /* PMSIGNAL_H */