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pg_prewarm: Add automatic prewarm feature.

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Periodically while the server is running, and at shutdown, write out a
list of blocks in shared buffers.  When the server reaches consistency
-- unfortunatey, we can't do it before that point without breaking
things -- reload those blocks into any still-unused shared buffers.

Mithun Cy and Robert Haas, reviewed and tested by Beena Emerson,
Amit Kapila, Jim Nasby, and Rafia Sabih.

Discussion: http://postgr.es/m/CAD__OugubOs1Vy7kgF6xTjmEqTR4CrGAv8w+ZbaY_+MZeitukw@mail.gmail.com
This commit is contained in:
Robert Haas
2017-08-21 14:43:00 -04:00
parent 66ed3829df
commit 79ccd7cbd5
11 changed files with 1035 additions and 4 deletions
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src/include/storage/buf_internals.h
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@@ -317,6 +317,7 @@ extern void StrategyNotifyBgWriter(int bgwprocno);
extern Size StrategyShmemSize(void);
extern void StrategyInitialize(bool init);
extern bool have_free_buffer(void);
/* buf_table.c */
extern Size BufTableShmemSize(int size);