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command line. We find this useful because we frequently deal with thousands of tables in an environment where neither the databases nor the tables are updated frequently. This helps allow us to cut down on the overhead of updating the list for every other primary loop of pg_autovacuum. I chose -i as the command-line argument and documented it briefly in the README. The patch was applied to the 7.4.7 version of pg_autovacuum in contrib. Thomas F.O'Connell
122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
/* pg_autovacuum.h
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* Header file for pg_autovacuum.c
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* (c) 2003 Matthew T. O'Connor
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*
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* $PostgreSQL: pgsql/contrib/pg_autovacuum/pg_autovacuum.h,v 1.15 2005/04/19 03:35:15 momjian Exp $
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*/
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#ifndef _PG_AUTOVACUUM_H
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#define _PG_AUTOVACUUM_H
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#include "libpq-fe.h"
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#include "lib/dllist.h"
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#define AUTOVACUUM_DEBUG 0
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#define VACBASETHRESHOLD 1000
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#define VACSCALINGFACTOR 2
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#define SLEEPBASEVALUE 300
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#define SLEEPSCALINGFACTOR 2
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#define UPDATE_INTERVAL 2
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/* these two constants are used to tell update_table_stats what operation we just perfomred */
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#define VACUUM_ANALYZE 0
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#define ANALYZE_ONLY 1
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#define TABLE_STATS_QUERY "select a.oid,a.relname,a.relnamespace,a.relpages,a.relisshared,a.reltuples,b.schemaname,b.n_tup_ins,b.n_tup_upd,b.n_tup_del from pg_class a, pg_stat_all_tables b where a.oid=b.relid and a.relkind = 'r'"
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#define PAGES_QUERY "select oid,reltuples,relpages from pg_class where oid=%u"
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#define FROZENOID_QUERY "select oid,age(datfrozenxid) from pg_database where datname = 'template1'"
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#define FROZENOID_QUERY2 "select oid,datname,age(datfrozenxid) from pg_database where datname!='template0'"
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/* Log levels */
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enum
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{
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LVL_DEBUG = 1,
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LVL_INFO,
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LVL_WARNING,
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LVL_ERROR,
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LVL_EXTRA
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};
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/* define cmd_args stucture */
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typedef struct cmdargs
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{
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int vacuum_base_threshold,
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analyze_base_threshold,
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update_interval,
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sleep_base_value,
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debug,
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/*
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* Cost-Based Vacuum Delay Settings for pg_autovacuum
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*/
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av_vacuum_cost_delay,
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av_vacuum_cost_page_hit,
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av_vacuum_cost_page_miss,
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av_vacuum_cost_page_dirty,
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av_vacuum_cost_limit,
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#ifndef WIN32
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daemonize;
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#else
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install_as_service,
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remove_as_service;
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#endif
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float vacuum_scaling_factor,
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analyze_scaling_factor,
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sleep_scaling_factor;
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char *user,
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*password,
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#ifdef WIN32
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*service_dependencies,
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*service_user,
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*service_password,
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#endif
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*host,
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*logfile,
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*port;
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} cmd_args;
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/*
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* Might need to add a time value for last time the whole database was
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* vacuumed. We need to guarantee this happens approx every 1Billion TX's
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*/
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typedef struct dbinfo
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{
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Oid oid;
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long age;
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long analyze_threshold,
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vacuum_threshold; /* Use these as defaults for table
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* thresholds */
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PGconn *conn;
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char *dbname,
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*username,
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*password;
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Dllist *table_list;
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} db_info;
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typedef struct tableinfo
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{
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char *schema_name,
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*table_name;
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float reltuples;
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int relisshared;
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Oid relid,
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relpages;
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long analyze_threshold,
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vacuum_threshold;
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long CountAtLastAnalyze; /* equal to: inserts + updates as
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* of the last analyze or initial
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* values at startup */
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long CountAtLastVacuum; /* equal to: deletes + updates as
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* of the last vacuum or initial
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* values at startup */
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long curr_analyze_count,
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curr_vacuum_count; /* Latest values from stats system */
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db_info *dbi; /* pointer to the database that this table
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* belongs to */
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} tbl_info;
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#endif /* _PG_AUTOVACUUM_H */
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