On Thu, Aug 11, 2011 at 7:27 PM, Waldo Nell pwn...@telkomsa.net wrote:
On 2011-08-11, at 17:18 , k...@rice.edu wrote:
One guess is that you are using the defaults for other costing parameters
and they
do not accurately reflect your system. This means that it will be a crap
shoot as
to
On Thu, Aug 11, 2011 at 9:46 AM, Antonin Faltynek pin...@gmail.com wrote:
Hi all,
I'm testing Streamin replication with one hot standby node and I'm
experiencing high delay of hot standby node.
When I reach aprox. 50 transactions per second where every transaction
includes only simple
On Fri, Aug 19, 2011 at 4:03 AM, Krzysztof Chodak
krzysztof.cho...@gmail.com wrote:
Is there any performance benefit of using constant size tuples?
not really. If your tuple size is under a known maximum length, then
a toast table doesn't have to be created. that's a pretty minor
detail
On Wed, Aug 24, 2011 at 11:58 AM, David Boreham david_l...@boreham.org wrote:
Apologies if this has already been posted here (I hadn't seen it before
today, and
can't find a previous post).
This will be of interest to anyone looking at using SSDs for database
storage :
On Wed, Aug 24, 2011 at 12:23 PM, Andy angelf...@yahoo.com wrote:
According to the specs for database storage:
Random 4KB arites: Up to 600 IOPS
Is that for real? 600 IOPS is *atrociously terrible* for an SSD. Not much
faster than mechanical disks.
Has anyone done any performance benchmark of
On Wed, Aug 24, 2011 at 1:48 PM, gnuo...@rcn.com wrote:
Original message
Date: Mon, 15 Aug 2011 19:49:52 -0400
From: pgsql-performance-ow...@postgresql.org (on behalf of Greg Smith
g...@2ndquadrant.com)
Subject: [PERFORM] Reports from SSD purgatory
To:
On Wed, Aug 24, 2011 at 2:32 PM, Tomas Vondra t...@fuzzy.cz wrote:
On 24 Srpen 2011, 20:48, gnuo...@rcn.com wrote:
It's worth knowing exactly what that means. Turns out that NAND quality
is price specific. There's gooduns and baduns. Is this a failure in the
controller(s) or the NAND?
On Tue, Sep 6, 2011 at 1:31 PM, Anibal David Acosta a...@devshock.com wrote:
Hi everyone,
My question is, if I have a table with 500,000 rows, and a SELECT of one row
is returned in 10 milliseconds, if the table has 6,000,000 of rows and
everything is OK (statistics, vacuum etc)
can i
On Tue, Aug 30, 2011 at 12:55 AM, Venkat Balaji venkat.bal...@verse.in wrote:
Thanks to all for your very helpful replies !
As Greg Smith rightly said, i faced a problem of missing connections between
the runs. I even ran the cron every less than a second, but, still that
would become too many
On Wed, Sep 14, 2011 at 2:44 AM, Greg Smith g...@2ndquadrant.com wrote:
If you want to get a useful measurement of seeks/second, setup pgbench-tools
with a SELECT-only test, and create a database that's 2 to 4X as big as RAM.
The TPS result you get from that is a much more useful number for
On Wed, Sep 14, 2011 at 4:03 AM, Heikki Linnakangas
heikki.linnakan...@enterprisedb.com wrote:
On 14.09.2011 03:24, Tom Lane wrote:
The big picture though is that we're not going to remove hash indexes,
even if they're nearly useless in themselves, because hash index
opclasses provide the
On Thu, Sep 15, 2011 at 3:28 PM, Claudio Freire klaussfre...@gmail.com wrote:
On Thu, Sep 15, 2011 at 5:00 PM, Merlin Moncure mmonc...@gmail.com wrote:
HM, what if you junked the current hash indexam, and just implemented
a wrapper over btree so that the 'hash index' was just short hand
On Thu, Sep 15, 2011 at 5:38 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Merlin Moncure mmonc...@gmail.com writes:
HM, what if you junked the current hash indexam, and just implemented
a wrapper over btree so that the 'hash index' was just short hand for
hashing the value into a standard index
On Thu, Sep 15, 2011 at 8:00 PM, Merlin Moncure mmonc...@gmail.com wrote:
On Thu, Sep 15, 2011 at 5:38 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Merlin Moncure mmonc...@gmail.com writes:
HM, what if you junked the current hash indexam, and just implemented
a wrapper over btree so that the 'hash
On Sat, Sep 17, 2011 at 4:48 PM, Jeff Janes jeff.ja...@gmail.com wrote:
On Tue, Sep 13, 2011 at 5:04 PM, Peter Geoghegan pe...@2ndquadrant.com
wrote:
On 14 September 2011 00:04, Stefan Keller sfkel...@gmail.com wrote:
Has this been verified on a recent release? I can't believe that hash
On Sun, Sep 18, 2011 at 9:59 AM, Stefan Keller sfkel...@gmail.com wrote:
Merlin and Jeff,
General remark again:It's hard for me to imagine that btree is
superior for all the issues mentioned before. I still believe in hash
index for primary keys and certain unique constraints where you need
On Mon, Sep 19, 2011 at 10:19 AM, Robert Klemme
shortcut...@googlemail.com wrote:
On Mon, Sep 19, 2011 at 4:04 PM, Merlin Moncure mmonc...@gmail.com wrote:
On Sun, Sep 18, 2011 at 9:59 AM, Stefan Keller sfkel...@gmail.com wrote:
Merlin and Jeff,
General remark again:It's hard for me
On Mon, Sep 19, 2011 at 1:53 PM, Claudio Freire klaussfre...@gmail.com wrote:
On Mon, Sep 19, 2011 at 3:43 PM, Merlin Moncure mmonc...@gmail.com wrote:
To make the test into i/o bound, I change the setrandom from 10 to
1000; this produced some unexpected results. The hash index
On Tue, Sep 20, 2011 at 5:44 PM, Royce Ausburn esapers...@royce.id.au wrote:
Hi all,
It looks like I've been hit with this well known issue. I have
a complicated query that is intended to run every few minutes, I'm using
JDBC's Connection.prepareStatement() mostly for nice parameterisation,
On Wed, Sep 28, 2011 at 12:06 PM, Venkat Balaji venkat.bal...@verse.in wrote:
Hello Everyone,
I am back with an issue (likely).
I am trying to create a table in our production database, and is taking 5
seconds.
We have executed VACUUM FULL and yet to run ANALYZE. Can i expect the CREATE
On Thursday, September 29, 2011, bricklen brick...@gmail.com wrote:
I recently had need of an array_except function but couldn't find
any good/existing examples. Based off the neat array_intersect
function at
http://www.postgres.cz/index.php/PostgreSQL_SQL_Tricks#Intersection_of_arrays
,
I put
2011/9/29 Ondrej Ivanič ondrej.iva...@gmail.com:
Hi,
On 30 September 2011 01:08, Kevin Grittner kevin.gritt...@wicourts.gov
wrote:
Is there a suggested number of child tables for table
partitioning,
Generally, don't go over about 100 partitions per table.
Having 365 partitions per table
On Fri, Sep 30, 2011 at 3:15 PM, Ben Chobot be...@silentmedia.com wrote:
On Sep 30, 2011, at 12:07 PM, bricklen wrote:
I've been informed that this type of operation is called symmetric
difference[1], and can be represented by A ∆ B. A couple of
alternative names were proposed,
On Tue, Oct 4, 2011 at 2:16 AM, Gavin Flower
gavinflo...@archidevsys.co.nz wrote:
On 01/10/11 01:23, Vitalii Tymchyshyn wrote:
Since you are using except and not except all, you are not looking at
arrays with duplicates.
For this case next function what the fastest for me:
create or replace
On Tue, Oct 11, 2011 at 8:05 PM, Dave Crooke dcro...@gmail.com wrote:
Hi James
I'm guessing the problem is that the combination of using a view and the way
the view is defined with an in-line temporary table is too complex for the
planner to introspect into, transform and figure out the
On Mon, Oct 24, 2011 at 11:53 AM, David Boreham david_l...@boreham.org wrote:
A few quick thoughts:
1. 320 would be the only SSD I'd trust from your short-list. It's the only
one with proper protection from unexpected power loss.
yeah.
2. Multiple RAID'ed SSDs sounds like (vast) overkill
On Tue, Oct 25, 2011 at 11:47 AM, Linos i...@linos.es wrote:
El 25/10/11 18:43, Tom Lane escribió:
Linos i...@linos.es writes:
i am having any problems with performance of queries that uses CTE, can
the
join on a CTE use the index of the original table?
CTEs act as optimization fences.
On Wed, Oct 26, 2011 at 4:00 AM, Linos i...@linos.es wrote:
El 25/10/11 19:11, Merlin Moncure escribió:
On Tue, Oct 25, 2011 at 11:47 AM, Linos i...@linos.es wrote:
El 25/10/11 18:43, Tom Lane escribió:
Linos i...@linos.es writes:
i am having any problems with performance of queries
On Thu, Oct 27, 2011 at 11:47 AM, Samuel Gendler
sgend...@ideasculptor.com wrote:
I've got a large mixed-used database, with the data warehouse side of things
consisting of several tables at hundreds of millions of rows, plus a number
of tables with tens of millions. There is partitioning, but
On Fri, Oct 28, 2011 at 10:28 AM, Marcus Engene meng...@engene.se wrote:
Hi list,
Every now and then I have write peaks which causes annoying delay on my
website. No particular reason it seems, just that laws of probability
dictates that there will be peaks every now and then.
Anyway,
On Fri, Oct 28, 2011 at 1:26 PM, Tomas Vondra t...@fuzzy.cz wrote:
On 28 Říjen 2011, 18:11, Merlin Moncure wrote:
On Fri, Oct 28, 2011 at 10:28 AM, Marcus Engene meng...@engene.se wrote:
Hi list,
Every now and then I have write peaks which causes annoying delay on my
website. No particular
On Thu, Oct 27, 2011 at 6:29 PM, Samuel Gendler
sgend...@ideasculptor.com wrote:
On Thu, Oct 27, 2011 at 2:15 PM, Samuel Gendler sgend...@ideasculptor.com
wrote:
There are definitely no bloated tables. The large tables are all
insert-only, and old data is aggregated up and then removed by
On Mon, Oct 31, 2011 at 10:34 AM, Albe Laurenz laurenz.a...@wien.gv.at wrote:
Heikki Linnakangas wrote:
We selected a 30MB bytea with psql connected with
-h localhost and found that it makes a huge
difference whether we have SSL encryption on or off.
Without SSL the SELECT finished in about
On Wed, Nov 2, 2011 at 8:05 AM, Yeb Havinga yebhavi...@gmail.com wrote:
Hello list,
A OCZ Vertex 2 PRO and Intel 710 SSD, both 100GB, in a software raid 1
setup. I was pretty convinced this was the perfect solution to run
PostgreSQL on SSDs without a IO controller with BBU. No worries for
On Wed, Nov 2, 2011 at 10:16 AM, Yeb Havinga yebhavi...@gmail.com wrote:
On 2011-11-02 15:26, Merlin Moncure wrote:
On Wed, Nov 2, 2011 at 8:05 AM, Yeb Havingayebhavi...@gmail.com wrote:
Hello list,
A OCZ Vertex 2 PRO and Intel 710 SSD, both 100GB, in a software raid 1
setup. I was pretty
On Wed, Nov 2, 2011 at 3:45 PM, Yeb Havinga yebhavi...@gmail.com wrote:
On 2011-11-02 16:16, Yeb Havinga wrote:
On 2011-11-02 15:26, Merlin Moncure wrote:
I would keep at least 20-30% of both drives unpartitioned to leave the
controller room to wear level and as well as other stuff. I'd try
On Thu, Nov 3, 2011 at 4:38 AM, Yeb Havinga yebhavi...@gmail.com wrote:
On 2011-11-02 22:08, Merlin Moncure wrote:
On Wed, Nov 2, 2011 at 3:45 PM, Yeb Havingayebhavi...@gmail.com wrote:
Intel latency graph at http://imgur.com/Hh3xI
Ocz latency graph at http://imgur.com/T09LG
curious: what
On Wed, Nov 9, 2011 at 9:15 AM, Kevin Grittner
kevin.gritt...@wicourts.gov wrote:
Jay Levitt jay.lev...@gmail.com wrote:
I don't get why the GROUP BY in this subquery forces it to scan
the entire users table (seq scan here, index scan on a larger
table) when there's only one row in users that
On Fri, Dec 2, 2011 at 1:49 PM, Bruce Momjian br...@momjian.us wrote:
Thiago Godoi wrote:
Hi all,
I found this presentation from B. Momjian:
http://momjian.us/main/writings/pgsql/performance.pdf
I'm interested in what he said about Intersect/Union X AND/OR , Can I
find a transcription
On Sat, Dec 10, 2011 at 7:27 PM, Jon Nelson jnelson+pg...@jamponi.net wrote:
I was experimenting with a few different methods of taking a line of
text, parsing it, into a set of fields, and then getting that info
into a table.
The first method involved writing a C program to parse a file,
On Tue, Dec 27, 2011 at 4:20 PM, Pavel Stehule pavel.steh...@gmail.com wrote:
Hello
2011/12/27 Carlo Stonebanks stonec.regis...@sympatico.ca:
We are currently using pltclu as our PL of choice AFTER plpgSql.
I'd like to know if anyone can comment on the performance costs of the
various PL
On Thu, Dec 29, 2011 at 3:33 AM, sgupta saurabh@gmail.com wrote:
I am doing POC on Posgtresql replication. I am using latest version of
postgresql i.e. 9.1. There are multiple replication solutions avaliable in
the market (PGCluster, Pgpool-II, Slony-I). Postgresql also provide in-built
On Fri, Dec 30, 2011 at 10:39 AM, Miguel Silva miguel.si...@tactis.pt wrote:
Hi all!
I've ran into a performance problem a few time ago and I've been trying to
figure out a solution until now. But since I've failed to come up with
anything conclusive, it's time to ask some help from people
2012/1/22 Tomas Vondra t...@fuzzy.cz:
Hi,
I'm working on a benchmark that demonstrates the effects of moving
tables or indexes to separate devices (SSD and HDD), and one thing that
really caught my eye are spikes in the tps charts. See this:
On Wed, Jan 25, 2012 at 7:43 AM, Claudio Freire klaussfre...@gmail.com wrote:
I know squat about how to implement this, but I've been considering
picking the low hanging fruit on that tree and patching up PG to try
the concept. Many of the items above would require a thread-safe
execution
On Thu, Jan 26, 2012 at 6:09 PM, Carlo Stonebanks
stonec.regis...@sympatico.ca wrote:
Assuming there was some sort of cost to pl/pgsql, I rewrote a bunch of
stored functions s in straight SQL. Each stored proc was calling the next,
so to get the full effect I had to track down all the pl/pgsql
On Tue, Jan 31, 2012 at 12:46 PM, Josh Berkus j...@agliodbs.com wrote:
Shared buffers is the cache maintained by PostgreSQL. All all the data
that you read/write need to go through shared buffers.
While this is technically true, I need to point out that you generally
increase shared_buffers
On Wed, Feb 1, 2012 at 11:10 AM, Gudmundur Johannesson
gudmundur.johannes...@gmail.com wrote:
Hi,
I have a table in Postgres like:
CREATE TABLE test
(
id integer,
dtstamp timestamp without time zone,
rating real
)
CREATE INDEX test_all
ON test
USING btree
(id , dtstamp ,
On Wed, Feb 1, 2012 at 12:50 PM, Gudmundur Johannesson
gudmundur.johannes...@gmail.com wrote:
Here are the answers to your questions:
1) I change the select statement so I am refering to 1 day at a time. In
that case the response time is similar. Basically, the data is not in cache
when I do
On Wed, Feb 1, 2012 at 12:48 PM, Alessandro Gagliardi
alessan...@path.com wrote:
LIMIT 65536; Total query runtime: 14846 ms.
- http://explain.depesz.com/s/I3E
LIMIT 69632: Total query runtime: 80141 ms.
- http://explain.depesz.com/s/9hp
So it looks like when the limit crosses a certain
On Thu, Feb 2, 2012 at 10:41 AM, Gudmundur Johannesson
gudmundur.johannes...@gmail.com wrote:
Do you think I should try using the latest build of the source for 9.2 since
index-only-scan is ready according to
http://www.depesz.com/index.php/2011/10/08/waiting-for-9-2-index-only-scans/
?
hm,
On Tue, Feb 7, 2012 at 11:59 AM, Gudmundur Johannesson
gudmundur.johannes...@gmail.com wrote:
On Tue, Feb 7, 2012 at 3:11 PM, Igor Neyman iney...@perceptron.com wrote:
From: Gudmundur Johannesson [mailto:gudmundur.johannes...@gmail.com]
Sent: Thursday, February 02, 2012 11:42 AM
To: Merlin
On Wed, Feb 8, 2012 at 1:58 PM, Kevin Traster
ktras...@freshgrillfoods.com wrote:
Typo: Work_mem = 32 MB
The definition for both column and index:
shareschange | numeric |
changes_shareschange btree (shareschange)
Index created using: CREATE INDEX changes_shareschange ON
On Wed, Feb 8, 2012 at 12:03 PM, David Yeu david@skype.net wrote:
Hi there,
We've got a pretty large table that sees millions of new rows a day, and
we're trying our best to optimize queries against it. We're hoping to find
some guidance on this list.
Thankfully, the types of queries
On Sat, Feb 18, 2012 at 8:50 AM, Steve Horn st...@stevehorn.cc wrote:
Hello all!
I have a very simple query that I am trying to wrap into a function:
SELECT gs.geo_shape_id AS gid,
gs.geocode
FROM geo_shapes gs
WHERE gs.geocode = 'xyz'
AND geo_type = 1
GROUP BY gs.geography,
On Fri, Feb 24, 2012 at 4:46 PM, Cherio che...@gmail.com wrote:
We are experiencing an unusual slowdown when using UUID field in JOIN when
updating a table. SQL looks like this:
UPDATE dst
SET data_field = src.data_field
FROM src
WHERE dst.uuid_field = src.uuid_field;
This statement takes
I've complained many times that
select (f()).*;
will execute f() once for each returned field of f() since the server
essentially expands that into:
select f().a, f().b;
try it yourself, see:
create function f(a out text, b out text) returns record as $$
begin
perform pg_sleep(1);
a := 'a';
On Mon, Mar 5, 2012 at 6:41 PM, Peter van Hardenberg p...@pvh.ca wrote:
On Mon, Mar 5, 2012 at 3:15 PM, Merlin Moncure mmonc...@gmail.com wrote:
I've complained many times that
select (f()).*;
will execute f() once for each returned field of f() since the server
essentially expands
On Tue, Mar 6, 2012 at 10:21 AM, Jan Otto as...@me.com wrote:
hi,
I've complained many times that
select (f()).*;
will execute f() once for each returned field of f() since the server
essentially expands that into:
select f().a, f().b;
try it yourself, see:
create function f(a out
On Mon, Mar 5, 2012 at 10:56 AM, Craig James cja...@emolecules.com wrote:
On Sun, Mar 4, 2012 at 10:36 AM, Rory Campbell-Lange
r...@campbell-lange.net wrote:
We do have complex transactions, but I haven't benchmarked the
performance so I can't describe it. Few of the databases are at the many
On Fri, Mar 9, 2012 at 5:15 AM, Rory Campbell-Lange
r...@campbell-lange.net wrote:
I've taken the liberty of reposting this message as my addendum to a
long thread that I started on the subject of adding a new db server to
our existing 4-year old workhorse got lost in discussion.
Our workload
On Sun, Mar 18, 2012 at 10:57 PM, Robert Poor rdp...@gmail.com wrote:
On Sun, Mar 18, 2012 at 08:30, Scott Marlowe scott.marl...@gmail.com wrote:
Why are you joining twice to the parent table? If you're trying to
recurse without a with clause, then wouldn't you join the last table
to the one
On Thu, Mar 22, 2012 at 10:13 AM, Kevin Grittner
kevin.gritt...@wicourts.gov wrote:
In particular, I recommend that you *never* leave transactions open
or hold locks while waiting for user response or input. They *will*
answer phone calls or go to lunch with things pending, potentially
On Wed, Mar 28, 2012 at 9:13 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Francois Deliege fdeli...@gmail.com writes:
I have the following table with millions of rows:
CREATE TABLE table1
(
col1 text,
col2 text,
col3 text,
col4 text,
col5 text,
col6 text
)
select col1 from
On Fri, Mar 30, 2012 at 10:02 AM, Andrew Dunstan and...@dunslane.net wrote:
Not answering your question, but standard advice is not to use RAID 5 or 6,
but RAID 10 for databases. Not sure if that still hold if you're using SSDs.
Yeah, for SSD the equations may change. Parity based RAID has two
On Tue, Apr 3, 2012 at 7:20 AM, Cesar Martin cmart...@gmail.com wrote:
Hello there,
I am having performance problem with new DELL server. Actually I have this
two servers
Server A (old - production)
-
2xCPU Six-Core AMD Opteron 2439 SE
64GB RAM
Raid controller Perc6 512MB
On Tue, Apr 3, 2012 at 1:01 PM, Tomas Vondra t...@fuzzy.cz wrote:
On 3.4.2012 17:42, Cesar Martin wrote:
Yes, setting is the same in both machines.
The results of bonnie++ running without arguments are:
Version 1.96 --Sequential Output-- --Sequential Input-
--Random-
On Tue, Apr 3, 2012 at 12:29 PM, Kevin Kempter
cs_...@consistentstate.com wrote:
Hi All;
I have a query that wants to update a table based on a join like this:
update test_one
set f_key = t.f_key
from
upd_temp1 t,
test_one t2
where
t.id_number = t2.id_number
upd_temp1 has
On Wed, Apr 4, 2012 at 4:42 AM, Cesar Martin cmart...@gmail.com wrote:
Hello,
Yesterday I changed the kernel setting, that said
Scott, vm.zone_reclaim_mode = 0. I have done new benchmarks and I have
noticed changes at least in Postgres:
First exec:
EXPLAIN ANALYZE SELECT * from
On Wed, Apr 4, 2012 at 1:55 PM, Scott Marlowe scott.marl...@gmail.com wrote:
On Wed, Apr 4, 2012 at 12:46 PM, Cesar Martin cmart...@gmail.com wrote:
Raid controller issue or driver problem was the first problem that I
studied.
I installed Centos 5.4 al the beginning, but I had performance
On Thu, Apr 5, 2012 at 10:49 AM, Tomas Vondra t...@fuzzy.cz wrote:
On 5.4.2012 17:17, Cesar Martin wrote:
Well, I have installed megacli on server and attach the results in file
megacli.txt. Also we have Dell Open Manage install in server, that can
generate a log of H800. I attach to mail with
On Thu, Apr 5, 2012 at 9:47 AM, Tomas Vondra t...@fuzzy.cz wrote:
On 5.4.2012 15:44, superman0920 wrote:
Sure, i will post that at tomorrow.
Today I install PG and MySQL at a Server. I insert 85 rows record
to each db.
I execute select count(*) from poi_all_new at two db.
MySQL takes
On Mon, Apr 9, 2012 at 6:50 PM, Tomas Vondra t...@fuzzy.cz wrote:
On 10.4.2012 00:37, Merlin Moncure wrote:
On Thu, Apr 5, 2012 at 9:47 AM, Tomas Vondra t...@fuzzy.cz wrote:
If you have slower drives, the dependency is about linear (half the
speed - twice the time). So either your drives
On Wed, Apr 11, 2012 at 5:11 PM, Eyal Wilde e...@impactsoft.co.il wrote:
hi,
i had a stored procedure in ms-sql server. this stored procedure gets a
parameter (account-id), dose about 20 queries, fills some temporary tables,
and finally, returns a few result-sets. this stored procedure
On Mon, Apr 16, 2012 at 10:45 AM, Scott Marlowe scott.marl...@gmail.com wrote:
On Mon, Apr 16, 2012 at 8:13 AM, Cesar Martin cmart...@gmail.com wrote:
Hi,
Finally the problem was BIOS configuration. DBPM had was set to Active
Power Controller I changed this to Max
Performance.
On Mon, Apr 16, 2012 at 9:02 AM, Tomek Walkuski
tomek.walku...@gmail.com wrote:
Hello group!
I have query like this:
SELECT
employments.candidate_id AS candidate_id,
SUM(TS_RANK(employers.search_vector, TO_TSQUERY('simple', 'One:* |
Two:* | Three:* | Four:*'), 2)) AS ts_rank
FROM
On Wed, Apr 18, 2012 at 2:32 AM, Eyal Wilde e...@impactsoft.co.il wrote:
hi all,
i ran vmstat during the test :
[yb@centos08 ~]$ vmstat 1 15
procs ---memory-- ---swap-- -io --system--
-cpu-
r b swpd free buff cache si so bi bo in cs us
On Wed, Apr 25, 2012 at 1:52 PM, Venki Ramachandran
venki_ramachand...@yahoo.com wrote:
Hi all:
Can someone please guide me as to how to solve this problem? If this is the
wrong forum, please let me know which one to post this one in. I am new to
Postgres (about 3 months into it)
I have
On Mon, Apr 30, 2012 at 8:49 AM, Walker, James Les jawal...@cantor.com wrote:
I’m trying to benchmark Postgres vs. several other databases on my
workstation. My workstation is running 64 bit Windows 7. It has 12 gb of RAM
and a W3550 @ 3 Ghz. I installed Postgres 9.1 using the windows
On Mon, Apr 30, 2012 at 5:00 PM, Thomas Kellerer spam_ea...@gmx.net wrote:
Merlin Moncure wrote on 30.04.2012 23:43:
Trying turning off fsync in postgrsql.conf to be sure.
This is a dangerous advise.
Turning off fsync can potentially corrupt the database in case of a system
failure (e.g
On Tue, May 1, 2012 at 7:51 AM, Walker, James Les jawal...@cantor.com wrote:
Exactly, if turning off fsync gives me 100 commits/sec then I know where my
bottleneck is and I can attack it. Keep in mind though that I already turned
off synchronous commit -- *really* dangerous -- and it didn't
On Tue, May 1, 2012 at 8:14 AM, Walker, James Les jawal...@cantor.com wrote:
SSD is OCZ-VERTEX3 MI. Controller is LSI SAS2 2008 Falcon. I'm working on
installing EDB. Then I can give you some I/O numbers.
It looks like the ssd doesn't have a nv cache and the raid card is a
simple sas hba
On Tue, May 1, 2012 at 9:44 AM, Walker, James Les jawal...@cantor.com wrote:
I installed the enterprisedb distribution and immediately saw a 400%
performance increase. Turning off fsck made it an order of magnitude better.
I'm now peaking at over 400 commits per second. Does that sound right?
On Sun, Apr 29, 2012 at 8:21 AM, Eyal Wilde e...@impactsoft.co.il wrote:
hi, all.
well, i wondered why there is high rate of bo (blocks out). the procedure is
practically read-only during the whole test. although it's not strictly
read-only, because in a certain condition, there might be
On Mon, Apr 30, 2012 at 1:32 PM, Ronald Hahn, DOCFOCUS INC.
rh...@docfocus.ca wrote:
Hi,
We have recently switch our product from MS SQL 2000 to Postgresql
9.0.7. We have tuned the searches and indexes so that they are very close
(often better) to what sql2k was giving us. We are noticing
On Thu, May 3, 2012 at 10:28 AM, Ronald Hahn, DOCFOCUS INC.
rh...@docfocus.ca wrote:
After some testing using wiershark (poor mans profiler) to see what was
going on with the network I found that it was the tools I've been using.
Both Aqua and PGadminIII have a large overhead per column to get
On Thu, May 3, 2012 at 12:07 PM, Eyal Wilde e...@impactsoft.co.il wrote:
guess what:
after reducing bo (blocks out) to ~10% by using a ramdisk (improving overall
performance by ~15-20%), i now managed to reduced it to ~3% by removing
the analyze temp-table statements.
it also :
reduced
On Wed, May 9, 2012 at 2:11 AM, Robert Klemme
shortcut...@googlemail.com wrote:
On Fri, May 4, 2012 at 3:04 PM, Merlin Moncure mmonc...@gmail.com wrote:
let's see the query plan...when you turned it off, did it go faster?
put your suspicious plans here: http://explain.depesz.com/
I suggest
On Wed, May 9, 2012 at 8:06 AM, MauMau maumau...@gmail.com wrote:
Hello,
I've heard from some people that synchronous streaming replication has
severe performance impact on the primary. They said that the transaction
throughput of TPC-C like benchmark (perhaps DBT-2) decreased by 50%. I'm
On Wed, May 9, 2012 at 12:03 PM, Robert Klemme
shortcut...@googlemail.com wrote:
On Wed, May 9, 2012 at 5:45 PM, Claudio Freire klaussfre...@gmail.com wrote:
On Wed, May 9, 2012 at 12:41 PM, Robert Klemme
shortcut...@googlemail.com wrote:
I am not sure whether the replicant can be triggered to
On Wed, May 9, 2012 at 5:34 PM, MauMau maumau...@gmail.com wrote:
Yes, I understand it is natural for the response time of each transaction to
double or more. But I think the throughput drop would be amortized among
multiple simultaneous transactions. So, 50% throughput decrease seems
On Tue, May 15, 2012 at 12:08 PM, David Boreham david_l...@boreham.org wrote:
We've reached to the point when we would like to try SSDs. We've got a
central DB currently 414 GB in size and increasing. Working set does not fit
into our 96GB RAM server anymore.
So, the main question is what to
On Tue, May 15, 2012 at 4:09 PM, John Lister john.lis...@kickstone.com wrote:
We've reached to the point when we would like to try SSDs. We've got a
central DB currently 414 GB in size and increasing. Working set does not
fit into our 96GB RAM server anymore.
So, the main question is what to
On Tue, May 15, 2012 at 3:00 PM, David Boreham david_l...@boreham.org wrote:
On 5/15/2012 12:16 PM, Rosser Schwarz wrote:
As the other posters in this thread have said, your best bet is
probably the Intel 710 series drives, though I'd still expect some
320-series drives in a RAID
On Wed, May 16, 2012 at 12:45 PM, David Boreham david_l...@boreham.org wrote:
On 5/16/2012 11:01 AM, Merlin Moncure wrote:
Although your assertion 100% supported by intel's marketing numbers,
there are some contradicting numbers out there that show the drives
offering pretty similar
On Thu, Apr 5, 2012 at 10:39 AM, Gregg Jaskiewicz gryz...@gmail.com wrote:
I know this is a very general question. But if you guys had to specify
system (could be one server or cluster), with sustainable transaction
rate of 1.5M tps running postgresql, what configuration and hardware
would you
On Mon, Jun 4, 2012 at 12:46 PM, Alejandro Carrillo faster...@yahoo.es wrote:
How I can compile in Windows? I tried to compile using Dev-C++ 4.9 and show
It's probably going to take some extra effort to compile backend
libraries with that compiler. The two supported compiling
environments on
On Wed, Jun 20, 2012 at 8:43 AM, Andy Colson a...@squeakycode.net wrote:
this is an obligation from the past:
http://archives.postgresql.org/pgsql-performance/2012-05/msg00017.php
the same test, that did ~230 results, is now doing ~700 results. that
is, BTW even better than mssql.
the
On Thu, Jun 21, 2012 at 3:07 PM, Andy Halsall halsall_a...@hotmail.com wrote:
I have two tables node and relationship. Each relationship record connects
two nodes and has an application keys (unfortunately named) that can be used
by the application to look-up a relationship and get from one
On Tue, Jun 26, 2012 at 8:36 AM, Merlin Moncure mmonc...@gmail.com wrote:
On Thu, Jun 21, 2012 at 3:07 PM, Andy Halsall halsall_a...@hotmail.com
wrote:
I have two tables node and relationship. Each relationship record connects
two nodes and has an application keys (unfortunately named
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