Error: "could not read from statistics collector pipe"

Started by Stephan Vollmerabout 20 years ago3 messagesgeneral
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#1Stephan Vollmer
svollmer@gmx.de

Hello!

In my PostgreSQL logfile, I see that the following entries occur
very frequently:

2006-01-27 10:37:29 FATAL could not read from statistics collector
pipe: No error
2006-01-27 10:37:30 LOG statistics collector process (PID 5940)
was terminated by signal 1

(PostgreSQL 8.1.2, WinXP SP2, Athlon64 X2 3800, 2 GB RAM)

These errors occur every 1-2 minutes when the DB is active. What do
these messages mean and how can I stop them from appearing?

I also noticed that during inserting lots of records, the DB becomes
increasingly slower the more records were inserted. For example, the
first 100000 records take 15 minutes, but records 300000-400000 take
3 hours. Could this be related to the messages above?

I tried to execute ANALYZE every 100000 records, but this did not
seem to help.

Thanks in advance for your help!

- Stephan

#2Merlin Moncure
mmoncure@gmail.com
In reply to: Stephan Vollmer (#1)
Re: Error: "could not read from statistics collector pipe"

2006-01-27 10:37:29 FATAL could not read from statistics collector
pipe: No error
2006-01-27 10:37:30 LOG statistics collector process (PID 5940)
was terminated by signal 1

try turning row level statistics off (or, during bulk inserts, turn
inserts off completely). I've seem this too but never nailed it down.

(PostgreSQL 8.1.2, WinXP SP2, Athlon64 X2 3800, 2 GB RAM)

These errors occur every 1-2 minutes when the DB is active. What do
these messages mean and how can I stop them from appearing?

I also noticed that during inserting lots of records, the DB becomes
increasingly slower the more records were inserted. For example, the
first 100000 records take 15 minutes, but records 300000-400000 take
3 hours. Could this be related to the messages above?

try defering index/key generationg until after the insert. probably
what is happening is you are blowing out your sort memory and swapping
occurs. of course, you can always bump sort_mem

merlin

#3Stephan Vollmer
svollmer@gmx.de
In reply to: Merlin Moncure (#2)
Re: Error: "could not read from statistics collector pipe"

Sorry for the late reply, I didn't have much time during the last
days to catch up on this list.

Merlin Moncure wrote:

try turning row level statistics off (or, during bulk inserts, turn
inserts off completely). I've seem this too but never nailed it down.

Thanks, I'll give that a try!

- Stephan