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Revert recovery prefetching feature.

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This set of commits has some bugs with known fixes, but at this late
stage in the release cycle it seems best to revert and resubmit next
time, along with some new automated test coverage for this whole area.

Commits reverted:

dc88460c: Doc: Review for "Optionally prefetch referenced data in recovery."
1d257577: Optionally prefetch referenced data in recovery.
f003d9f8: Add circular WAL decoding buffer.
323cbe7c: Remove read_page callback from XLogReader.

Remove the new GUC group WAL_RECOVERY recently added by a55a9847, as the
corresponding section of config.sgml is now reverted.

Discussion: https://postgr.es/m/CAOuzzgrn7iKnFRsB4MHp3UisEQAGgZMbk_ViTN4HV4-Ksq8zCg%40mail.gmail.com
This commit is contained in:
Thomas Munro
2021-05-10 16:00:53 +12:00
parent 63db0ac3f9
commit c2dc19342e
35 changed files with 859 additions and 3124 deletions
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src/include/access/xlog.h
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@ -132,7 +132,6 @@ extern char *PrimaryConnInfo;
extern char *PrimarySlotName;
extern bool wal_receiver_create_temp_slot;
extern bool track_wal_io_timing;
extern int wal_decode_buffer_size;
/* indirectly set via GUC system */
extern TransactionId recoveryTargetXid;