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Simplify and rename some GUC variables, per various recent discussions:
* stats_start_collector goes away; we always start the collector process, unless prevented by a problem with setting up the stats UDP socket. * stats_reset_on_server_start goes away; it seems useless in view of the availability of pg_stat_reset(). * stats_block_level and stats_row_level are merged into a single variable "track_counts", which controls all reports sent to the collector process. * stats_command_string is renamed to track_activities. * log_autovacuum is renamed to log_autovacuum_min_duration to better reflect its meaning. The log_autovacuum change is not a compatibility issue since it didn't exist before 8.3 anyway. The other changes need to be release-noted.
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- doc/src/sgml/config.sgml 38 additions, 96 deletionsdoc/src/sgml/config.sgml
- doc/src/sgml/maintenance.sgml 8 additions, 9 deletionsdoc/src/sgml/maintenance.sgml
- doc/src/sgml/monitoring.sgml 16 additions, 32 deletionsdoc/src/sgml/monitoring.sgml
- doc/src/sgml/release.sgml 2 additions, 3 deletionsdoc/src/sgml/release.sgml
- src/backend/commands/analyze.c 6 additions, 6 deletionssrc/backend/commands/analyze.c
- src/backend/commands/vacuumlazy.c 5 additions, 5 deletionssrc/backend/commands/vacuumlazy.c
- src/backend/postmaster/autovacuum.c 8 additions, 20 deletionssrc/backend/postmaster/autovacuum.c
- src/backend/postmaster/pgstat.c 26 additions, 68 deletionssrc/backend/postmaster/pgstat.c
- src/backend/utils/misc/guc.c 19 additions, 43 deletionssrc/backend/utils/misc/guc.c
- src/backend/utils/misc/postgresql.conf.sample 7 additions, 12 deletionssrc/backend/utils/misc/postgresql.conf.sample
- src/include/pgstat.h 31 additions, 34 deletionssrc/include/pgstat.h
- src/include/postmaster/autovacuum.h 2 additions, 2 deletionssrc/include/postmaster/autovacuum.h
- src/test/regress/expected/stats.out 3 additions, 6 deletionssrc/test/regress/expected/stats.out
- src/test/regress/sql/stats.sql 1 addition, 5 deletionssrc/test/regress/sql/stats.sql
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