From: Andrus <eetasoft@online.ee>
To: pgsql-performance@postgresql.org
Subject: Re: Query runs 38 seconds for small database!
Date: Mon, 8 May 2006 19:15:36 +0300
Message-ID: <e3nqv9$30v0$1@news.hub.org> (raw)
References: <e3n8at$1f7i$1@news.hub.org>
<26838.1147099614@sss.pgh.pa.us>
>> " -> Seq Scan on konto dbkonto (cost=0.00..23.30
>> rows=1
>> width=44) (actual time=0.017..1.390 rows=219 loops=1)"
>> " Filter: (iseloom = 'A'::bpchar)"
>
> Anytime you see a row estimate that far off about a simple single-column
> condition, it means your statistics are out-of-date.
Than you. I addded ANALYZE command and now query works fast.
I see autovacuum: processing database "mydb" messages in log file and I have
stats_start_collector = on
stats_row_level = on
in config file. Why statistics was out-of-date ?
Andrus.
My postgres.conf file (only uncommented settings are listed):
listen_addresses = '*'
max_connections = 40
shared_buffers = 1000
log_destination = 'stderr'
redirect_stderr = on # Enable capturing of stderr into log
log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # Log file name pattern.
log_rotation_age = 1440 # Automatic rotation of logfiles will
log_rotation_size = 10240 # Automatic rotation of logfiles will
log_min_error_statement = 'warning' # Values in order of increasing
severity:
silent_mode = on
log_line_prefix = "'%t %u %d %h %p %i %l %x %q'"
stats_start_collector = on
stats_row_level = on
autovacuum = on # enable autovacuum subprocess?
lc_messages = 'C' # locale for system error message
lc_monetary = 'C' # locale for monetary formatting
lc_numeric = 'C' # locale for number formatting
lc_time = 'C' # locale for time formatting
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To: pgsql-performance@postgresql.org
Cc: eetasoft@online.ee
Subject: Re: Query runs 38 seconds for small database!
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