143 lines
4.4 KiB
C
143 lines
4.4 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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#include "postgres_fe.h"
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#include <unistd.h>
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#endif
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#include <time.h>
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#include <sys/time.h>
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/* These next two lines are correct when pg_autovaccum is compiled
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from within the postgresql source tree */
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#include "libpq-fe.h"
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#include "lib/dllist.h"
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/* Had to change the last two lines to compile on
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Redhat outside of postgresql source tree */
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/*
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#include "/usr/include/libpq-fe.h"
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#include "/usr/include/pgsql/server/lib/dllist.h"
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*/
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#define AUTOVACUUM_DEBUG 1
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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 FRONTEND
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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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/* define atooid */
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#define atooid(x) ((Oid) strtoul((x), NULL, 10))
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/* define cmd_args stucture */
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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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sleep_base_value,
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debug,
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daemonize;
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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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*host,
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*logfile,
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*port;
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};
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typedef struct cmdargs cmd_args;
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/* define cmd_args as global so we can get to them everywhere */
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cmd_args *args;
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/* Might need to add a time value for last time the whold database was vacuumed.
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I think we need to guarantee this happens approx every 1Million TX's */
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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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};
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typedef struct dbinfo db_info;
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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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};
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typedef struct tableinfo tbl_info;
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/* Functions for dealing with command line arguements */
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static cmd_args *get_cmd_args(int argc, char *argv[]);
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static void print_cmd_args(void);
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static void free_cmd_args(void);
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static void usage(void);
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/* Functions for managing database lists */
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static Dllist *init_db_list(void);
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static db_info *init_dbinfo(char *dbname, Oid oid, long age);
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static void update_db_list(Dllist *db_list);
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static void remove_db_from_list(Dlelem *db_to_remove);
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static void print_db_info(db_info * dbi, int print_table_list);
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static void print_db_list(Dllist *db_list, int print_table_lists);
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static int xid_wraparound_check(db_info * dbi);
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static void free_db_list(Dllist *db_list);
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/* Functions for managing table lists */
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static tbl_info *init_table_info(PGresult *conn, int row, db_info * dbi);
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static void update_table_list(db_info * dbi);
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static void remove_table_from_list(Dlelem *tbl_to_remove);
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static void print_table_list(Dllist *tbl_node);
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static void print_table_info(tbl_info * tbl);
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static void update_table_thresholds(db_info * dbi, tbl_info * tbl, int vacuum_type);
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static void free_tbl_list(Dllist *tbl_list);
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/* A few database helper functions */
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static int check_stats_enabled(db_info * dbi);
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static PGconn *db_connect(db_info * dbi);
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static void db_disconnect(db_info * dbi);
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static PGresult *send_query(const char *query, db_info * dbi);
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/* Other Generally needed Functions */
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static void daemonize(void);
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static void log_entry(const char *logentry);
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