Gavin Sherry wrote:
On Tue, 14 Mar 2006, Chris wrote:
Hi all,
I'm trying to work out why my 8.1 system is slower than my 7.4 system
for importing data.
The import is a lot of "insert into" commands - it's a converted
database from another system so I can't change it to copy commands.
<snip>
new config variables...
autovacuum = off
bgwriter_all_maxpages = 15
bgwriter_all_percent = 2.0
bgwriter_delay = 500
bgwriter_lru_maxpages = 10
bgwriter_lru_percent = 5.0
checkpoint_segments = 10
checkpoint_timeout = 300
commit_delay = 10000
commit_siblings = 10
fsync = on
lc_messages = 'en_US.UTF-8'
lc_monetary = 'en_US.UTF-8'
lc_numeric = 'en_US.UTF-8'
lc_time = 'en_US.UTF-8'
log_connections = on
log_destination = 'syslog'
log_disconnections = on
log_duration = on
log_statement = 'all'
max_connections = 16
redirect_stderr = on
shared_buffers = 12500
silent_mode = off
stats_command_string = off
syslog_facility = 'LOCAL0'
syslog_ident = 'postgres'
temp_buffers = 500
wal_buffers = 256
I changed a couple of things and restarted postgres before trying again.
Still getting pretty insert times :(
INSERT 0 1
Time: 1251.956 ms
INSERT 0 1
Time: 700.244 ms
INSERT 0 1
Time: 851.254 ms
INSERT 0 1
Time: 407.725 ms
INSERT 0 1
Time: 267.881 ms
INSERT 0 1
Time: 575.834 ms
INSERT 0 1
Time: 371.914 ms
INSERT 0 1
The table schema is bare:
CREATE TABLE ArticleLive_articlepages (
PageID serial not null,
ArticleID integer default '0',
SortOrderID integer default '0',
Title varchar(100) NOT NULL default '',
Content text,
PRIMARY KEY (PageID)
);
(I know the fields will be lowercased...).
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