Tom Lane wrote:
Joe Conway [EMAIL PROTECTED] writes:
Any idea where I can get my hands on the latest version. I found the
original post from Tom, but I thought there was a later version with
both number of pages and time to sleep as knobs.
That was as far as I got. I think Jan posted a more
are interested. I'll report back once
I have some results.
Joe
Index: src/backend/access/nbtree/nbtree.c
===
RCS file: /home/pgsql/CvsRoot/pgsql-server/src/backend/access/nbtree/nbtree.c,v
retrieving revision 1.106
diff -c -b -r1.106
there was a later version with
both number of pages and time to sleep as knobs.
Thanks,
Joe
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TIP 7: don't forget to increase your free space map settings
Tom Lane wrote:
Joe Conway [EMAIL PROTECTED] writes:
Any idea where I can get my hands on the latest version. I found the
original post from Tom, but I thought there was a later version with
both number of pages and time to sleep as knobs.
That was as far as I got. I think Jan posted a more
it a try on one of my
own machines (all Linux, either RHAS3, RH9, or Fedora).
Joe
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TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
.
Joe
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TIP 8: explain analyze is your friend
minutes. Restarting the postmaster causes the cycle to repeat, i.e.
the first one or two inserts are back to the 1.5 minute range.
Any ideas spring to mind? I don't have much experience with Postgres on
Solaris -- could it be related to that somehow?
Thanks for any insights.
Joe
always restore from last night and re-run everything that was done since
then.
If you can, use COPY -- it is far faster than INSERT.
See:
http://www.postgresql.org/docs/current/static/sql-copy.html
HTH,
Joe
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TIP 9: the planner
))?
Also, have you run VACUUM ANALYZE lately?
Joe
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TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
, this is still taking a long time.
---
Seq Scan on user_account (cost=0.00..748990.51 rows=36242 width=716)
Do you have an index on user_account.user_account_id?
Joe
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TIP 8: explain analyze is your friend
, but
perhaps some sort of calculated checksum or hash would work to determine
if the data has changed?
Joe
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TIP 6: Have you searched our list archives?
http://archives.postgresql.org
Scott Cain wrote:
Oh, and I forgot to mention: it's highly compressed (bzip2 -9) and is
109M.
Thanks. I'll grab a copy from home later today and see if I can find
some time to poke at it.
Joe
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TIP 1: subscribe
Tom Lane wrote:
Scott Cain [EMAIL PROTECTED] writes:
A few days ago, I asked for advice on speeding up substring queries on
the GENERAL mailing list. Joe Conway helpfully pointed out the ALTER
TABLE STORAGE EXTERNAL documentation. After doing the alter,
the queries got slower! Here
.
HTH,
Joe
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
). Then do:
SELECT num1, num2, num3 FROM mytable WHERE element = 'an_element' order
by date DESC LIMIT 20;
Replace num1, num2, num3 by whatever columns you want, and LIMIT X as
the number of rows you want.
HTH,
Joe
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TIP 9
the constraint of 5 drives? 1 drive for OS, and 4 for RAID 1+0 for
data-plus-WAL? I guess the ideal would be to find enough money for that
6th drive, use the mirrored pair for both OS and WAL.
Joe
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TIP 3: if posting/reading
Adam Witney wrote:
I think the issue from the original posters point of view is that the Dell
PE2650 can only hold a maximum of 5 internal drives
True enough, but maybe that's a reason to be looking at other
alternatives. I think he said the hardware hasn't been bought yet.
Joe
Jean-Luc Lachance wrote:
I am currious. How can you have RAID 1+0 with only 2 drives?
If you are thinking about partitioning the drives, wont this defeate the
purpose?
Yeah -- Hannu already pointed out that my mind was fuzzy when I made
that statement :-(. See subsequent posts.
Joe
?
Joe
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TIP 7: don't forget to increase your free space map settings
set sort_mem too
high, and you have a lot of simultaneous sorts, you can drive the server
into swapping, which obviously is a very bad thing. You want it set as
high as possible, but not so high given your usage patterns that you
wind up swapping.
Joe
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