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Allow background writing to be shut down by setting limit values to zero.

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This does not disable the bgwriter process: it still has to wake up often
enough to collect fsync requests from backends in a timely fashion.  But
it responds to the recent gripe about not being able to prevent the disk
from being spun up constantly.
This commit is contained in:
Tom Lane
2004-10-17 22:01:51 +00:00
parent bdbe9c9f06
commit 4347cc2392
4 changed files with 20 additions and 12 deletions
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8
src/backend/utils/misc/guc.c
View File

@@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.244 2004/10/16 19:08:38 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.245 2004/10/17 22:01:51 tgl Exp $
*
*--------------------------------------------------------------------
*/
@@ -1248,7 +1248,7 @@ static struct config_int ConfigureNamesInt[] =
NULL
},
&BgWriterDelay,
200, 10, 5000, NULL, NULL
200, 10, 10000, NULL, NULL
},
{
@@ -1257,7 +1257,7 @@ static struct config_int ConfigureNamesInt[] =
NULL
},
&BgWriterPercent,
1, 1, 100, NULL, NULL
1, 0, 100, NULL, NULL
},
{
@@ -1266,7 +1266,7 @@ static struct config_int ConfigureNamesInt[] =
NULL
},
&BgWriterMaxPages,
100, 1, 1000, NULL, NULL
100, 0, 1000, NULL, NULL
},
{

6
src/backend/utils/misc/postgresql.conf.sample
View File

@@ -98,9 +98,9 @@
# - Background writer -
#bgwriter_delay = 200 # 10-5000 milliseconds
#bgwriter_percent = 1 # 1-100% of dirty buffers
#bgwriter_maxpages = 100 # 1-1000 buffers max at once
#bgwriter_delay = 200 # 10-10000 milliseconds between rounds
#bgwriter_percent = 1 # 0-100% of dirty buffers in each round
#bgwriter_maxpages = 100 # 0-1000 buffers max per round
#---------------------------------------------------------------------------