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Commit7cce39c

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The following patch should allow UPDATE_INTERVAL to be specified on the
command line. We find this useful because we frequently deal withthousands of tables in an environment where neither the databases northe tables are updated frequently. This helps allow us to cut down onthe overhead of updating the list for every other primary loop ofpg_autovacuum.I chose -i as the command-line argument and documented it briefly inthe README.The patch was applied to the 7.4.7 version of pg_autovacuum in contrib.Thomas F.O'Connell
1 parentaa8bdab commit7cce39c

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3 files changed

+18
-6
lines changed

3 files changed

+18
-6
lines changed

‎contrib/pg_autovacuum/README.pg_autovacuum

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -123,6 +123,10 @@ pg_autovacuum has the following optional arguments:
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-V vacuum scaling factor: see "Vacuum and Analyze" below.
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-a analyze base threshold: see "Vacuum and Analyze" below.
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-A analyze scaling factor: see "Vacuum and Analyze" below.
126+
-i update interval: how often (in terms of iterations of the primary loop
127+
over the database list) to update the database list. The default is 2,
128+
which means the list will be updated before every other pass through
129+
the database list.
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-L log file: Name of file to which output is submitted, otherwise STDERR
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-U username: Username pg_autovacuum will use to connect with, if not
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specified the current username is used.
@@ -157,6 +161,7 @@ the time of writing they are:
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-A 1 (half of -V if not specified)
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-s 300 (5 minutes)
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-S 2
164+
-i 2
160165

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The following arguments are used on Windows only:
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‎contrib/pg_autovacuum/pg_autovacuum.c

Lines changed: 11 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -4,7 +4,7 @@
44
* Revisions by Christopher B. Browne, Liberty RMS
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* Win32 Service code added by Dave Page
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*
7-
* $PostgreSQL: pgsql/contrib/pg_autovacuum/pg_autovacuum.c,v 1.30 2005/04/03 00:01:51 tgl Exp $
7+
* $PostgreSQL: pgsql/contrib/pg_autovacuum/pg_autovacuum.c,v 1.31 2005/04/19 03:35:15 momjian Exp $
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*/
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1010
#include"postgres_fe.h"
@@ -1103,6 +1103,7 @@ get_cmd_args(int argc, char *argv[])
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args->analyze_base_threshold=-1;
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args->analyze_scaling_factor=-1;
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args->debug=AUTOVACUUM_DEBUG;
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args->update_interval=UPDATE_INTERVAL;
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#ifndefWIN32
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args->daemonize=0;
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#else
@@ -1157,6 +1158,9 @@ get_cmd_args(int argc, char *argv[])
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case'A':
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args->analyze_scaling_factor=atof(optarg);
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break;
1161+
case'i':
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args->update_interval=atoi(optarg);
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break;
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case'c':
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args->av_vacuum_cost_delay=atoi(optarg);
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break;
@@ -1341,6 +1345,8 @@ print_cmd_args(void)
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log_entry(logbuffer,LVL_INFO);
13421346
sprintf(logbuffer," args->analyze_scaling_factor=%f",args->analyze_scaling_factor);
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log_entry(logbuffer,LVL_INFO);
1348+
sprintf(logbuffer," args->update_interval=%i",args->update_interval);
1349+
log_entry(logbuffer,LVL_INFO);
13441350

13451351
if (args->av_vacuum_cost_delay!=-1)
13461352
sprintf(logbuffer," args->av_vacuum_cost_delay=%d",args->av_vacuum_cost_delay);
@@ -1646,8 +1652,8 @@ VacuumLoop(int argc, char **argv)
16461652
}
16471653
}
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1649-
if (loops %UPDATE_INTERVAL==0)/* Update the list if it's
1650-
* time */
1655+
if (loops %args->update_interval==0)/* Update the list if it's
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* time */
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update_db_list(db_list);/* Add and remove databases from
16521658
* the list */
16531659

@@ -1661,8 +1667,8 @@ VacuumLoop(int argc, char **argv)
16611667

16621668
if (dbs->conn!=NULL)
16631669
{
1664-
if (loops %UPDATE_INTERVAL==0)/* Update the list if
1665-
* it's time */
1670+
if (loops %args->update_interval==0)/* Update the list if
1671+
* it's time */
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update_table_list(dbs);/* Add and remove tables
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* from the list */
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‎contrib/pg_autovacuum/pg_autovacuum.h

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@
22
* Header file for pg_autovacuum.c
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* (c) 2003 Matthew T. O'Connor
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*
5-
* $PostgreSQL: pgsql/contrib/pg_autovacuum/pg_autovacuum.h,v 1.14 2004/12/02 22:48:10 momjian Exp $
5+
* $PostgreSQL: pgsql/contrib/pg_autovacuum/pg_autovacuum.h,v 1.15 2005/04/19 03:35:15 momjian Exp $
66
*/
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#ifndef_PG_AUTOVACUUM_H
@@ -44,6 +44,7 @@ typedef struct cmdargs
4444
{
4545
intvacuum_base_threshold,
4646
analyze_base_threshold,
47+
update_interval,
4748
sleep_base_value,
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debug,
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