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Revert "Add eager and lazy freezing strategies to VACUUM."

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This reverts commit 4d41799261.  Broad
concerns about regressions caused by eager freezing strategy have been
raised.  Whether or not these concerns can be worked through in any time
frame is far from certain.

Discussion: https://postgr.es/m/20230126004347.gepcmyenk2csxrri@awork3.anarazel.de
This commit is contained in:
Peter Geoghegan
2023-01-25 22:22:27 -08:00
parent 8b5f36bb6c
commit 6c6b497266
12 changed files with 14 additions and 197 deletions
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12
src/include/commands/vacuum.h
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@@ -222,9 +222,6 @@ typedef struct VacuumParams
* use default */
int multixact_freeze_table_age; /* multixact age at which to scan
* whole table */
int freeze_strategy_threshold; /* threshold to use eager
* freezing, in megabytes, -1 to
* use default */
bool is_wraparound; /* force a for-wraparound vacuum */
int log_min_duration; /* minimum execution threshold in ms at
* which autovacuum is logged, -1 to use
@@ -277,14 +274,6 @@ struct VacuumCutoffs
*/
TransactionId FreezeLimit;
MultiXactId MultiXactCutoff;
/*
* Eager freezing strategy is used whenever target rel's main fork size
* exceeds freeze_strategy_threshold_pages. Otherwise lazy freezing
* strategy is used. (Actually, there are exceptions. Non-permanent
* tables always use eager freezing strategy.)
*/
BlockNumber freeze_strategy_threshold_pages;
};
/*
@@ -308,7 +297,6 @@ extern PGDLLIMPORT int vacuum_freeze_min_age;
extern PGDLLIMPORT int vacuum_freeze_table_age;
extern PGDLLIMPORT int vacuum_multixact_freeze_min_age;
extern PGDLLIMPORT int vacuum_multixact_freeze_table_age;
extern PGDLLIMPORT int vacuum_freeze_strategy_threshold;
extern PGDLLIMPORT int vacuum_failsafe_age;
extern PGDLLIMPORT int vacuum_multixact_failsafe_age;