Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Jesper Krogh
Scott Marlowe wrote: On Thu, Mar 13, 2008 at 3:09 PM, justin <[EMAIL PROTECTED]> wrote: I chose to use ext3 on these partition You should really consider another file system. ext3 has two flaws that mean I can't really use it properly. A 2TB file system size limit (at least on the servers

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Jesper Krogh
Scott Marlowe wrote: On Fri, Mar 14, 2008 at 12:17 AM, Jesper Krogh <[EMAIL PROTECTED]> wrote: Scott Marlowe wrote: > On Thu, Mar 13, 2008 at 3:09 PM, justin <[EMAIL PROTECTED]> wrote: > >> I chose to use ext3 on these partition > > You should really consider another file system. ext3 has

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Scott Marlowe
On Fri, Mar 14, 2008 at 12:19 AM, Scott Marlowe <[EMAIL PROTECTED]> wrote: > > On Fri, Mar 14, 2008 at 12:17 AM, Jesper Krogh <[EMAIL PROTECTED]> wrote: > > > > Scott Marlowe wrote: > > > On Thu, Mar 13, 2008 at 3:09 PM, justin <[EMAIL PROTECTED]> wrote: > > > > > >> I chose to use ext3 on

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Scott Marlowe
On Fri, Mar 14, 2008 at 12:17 AM, Jesper Krogh <[EMAIL PROTECTED]> wrote: > > Scott Marlowe wrote: > > On Thu, Mar 13, 2008 at 3:09 PM, justin <[EMAIL PROTECTED]> wrote: > > > >> I chose to use ext3 on these partition > > > > You should really consider another file system. ext3 has two flaws

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Scott Marlowe
On Thu, Mar 13, 2008 at 3:09 PM, justin <[EMAIL PROTECTED]> wrote: > I chose to use ext3 on these partition You should really consider another file system. ext3 has two flaws that mean I can't really use it properly. A 2TB file system size limit (at least on the servers I've tested) and it loc

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Scott Marlowe
On Thu, Mar 13, 2008 at 4:53 PM, justin <[EMAIL PROTECTED]> wrote: > > I'm ran pgbench from my laptop to the new server > > My laptop is dual core with 2 gigs of ram and 1 gig enthernet connection to > server. so i don't think the network is going to be a problem in the test. > > When i look

Re: [PERFORM] Recomendations on raid controllers raid 1+0

2008-03-13 Thread Scott Marlowe
On Thu, Mar 13, 2008 at 5:14 PM, Leigh Dyer <[EMAIL PROTECTED]> wrote: > Glyn Astill wrote: > > Bonie++ benchmarks below. > > > > I believe the the Perc 5/i Raid 10 mode is actually a span of mirrors, > rather than the expected stripe of mirrors we should expect from 1+0, and > that this is th

Re: [PERFORM] temp tables

2008-03-13 Thread Tom Lane
James Mansion <[EMAIL PROTECTED]> writes: > Do CREATE TEMP TABLE table have any special treatment regarding eliding > sync operations Yes; neither fsync nor WAL-writing is done for temp tables. > or deferring creation of disk files in the case where memory pressure > does not require a spill?

Re: [PERFORM] Recomendations on raid controllers raid 1+0

2008-03-13 Thread Leigh Dyer
Glyn Astill wrote: Bonie++ benchmarks below. I believe the the Perc 5/i Raid 10 mode is actually a span of mirrors, rather than the expected stripe of mirrors we should expect from 1+0, and that this is the reason for the shitty performance. Could you build three RAID-1 mirrors on the devic

[PERFORM] temp tables

2008-03-13 Thread James Mansion
Do CREATE TEMP TABLE table have any special treatment regarding eliding sync operations or deferring creation of disk files in the case where memory pressure does not require a spill? James -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your s

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread justin
- Original Message - From: "Greg Smith" <[EMAIL PROTECTED]> To: Sent: Thursday, March 13, 2008 4:27 PM Subject: Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10 On Thu, 13 Mar 2008, Joshua D. Drake wrote: Greg Smith <[EMAIL PROTECTED]> wrote: wal_sync_method = open_sync The

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Greg Smith
On Thu, 13 Mar 2008, Joshua D. Drake wrote: Greg Smith <[EMAIL PROTECTED]> wrote: wal_sync_method = open_sync There was a bug report I haven't had a chance to investigate yet that suggested some recent Linux versions have issues when using open_sync. I'd suggest popping that back to the defau

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Joshua D. Drake
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Thu, 13 Mar 2008 12:01:50 -0400 (EDT) Greg Smith <[EMAIL PROTECTED]> wrote: > On Thu, 13 Mar 2008, Craig James wrote: > > >> wal_sync_method = open_sync > > There was a bug report I haven't had a chance to investigate yet that > suggested some r

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread justin
Absolutely on the battery backup. I did not load the linux drivers from dell, it works so i figured i was not going to worry about it. This server is so oversized for its load its unreal. I have always gone way overboard on server specs and making sure its redundant. The difference in our

Re: [PERFORM] ER diagram tool

2008-03-13 Thread Andrej Ricnik-Bay
On 14/03/2008, sathiya psql <[EMAIL PROTECTED]> wrote: > no other groups are replying. You waited for a *whole* *hour* before deciding to cross-post? Wow. -- Please don't top post, and don't use HTML e-Mail :} Make your quotes concise. http://www.american.edu/econ/notes/htmlmail.htm -- S

Re: [PERFORM] Recomendations on raid controllers raid 1+0

2008-03-13 Thread Glyn Astill
Bonie++ benchmarks below. I believe the the Perc 5/i Raid 10 mode is actually a span of mirrors, rather than the expected stripe of mirrors we should expect from 1+0, and that this is the reason for the shitty performance. RAID 5 == Version 1.03 --Sequential Output-- --Seque

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Greg Smith
On Thu, 13 Mar 2008, Craig James wrote: wal_sync_method = open_sync There was a bug report I haven't had a chance to investigate yet that suggested some recent Linux versions have issues when using open_sync. I'd suggest popping that back to the default for now unless you have time to reall

Re: [PERFORM] Recomendations on raid controllers raid 1+0

2008-03-13 Thread Guillaume Smet
Glyn, On Thu, Mar 13, 2008 at 1:33 PM, Glyn Astill <[EMAIL PROTECTED]> wrote: > I'm looking at switching out the perc5i (lsi megaraid) cards from our > Dell 2950s for something else as they're crap at raid 10. Do you have numbers? Perc 5/i cards perform quite well for us (we have a 8 disks RAID

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Craig James
Joshua D. Drake wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Wed, 12 Mar 2008 21:55:18 -0700 Craig James <[EMAIL PROTECTED]> wrote: Diffs from original configuration: max_connections = 1000 shared_buffers = 400MB work_mem = 256MB max_fsm_pages = 100 max_fsm_relations = 5000 wa

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Craig James
Doug Knight wrote: All, I am in the process of specing out a purchase for our production systems, and am looking at the Dell 2950s as well. I am very interested to see where this thread goes, and what combinations work with different application loading types. Our systems will have one pair of

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Craig James
Justin Graf wrote: I recent just got a new server also from dell 2 weeks ago went with more memory slower CPU, and smaller harddrives have not run pgbench Dell PE 2950 III 2 Quad Core 1.866 Ghz 16 gigs of ram. 8 hard drives 73Gig 10k RPM SAS 2 drives in Mirrored for OS, Binaries, and WAL 6 in a

Re: [PERFORM] Repeated execution of identical subqueries

2008-03-13 Thread Craig James
Craig Ringer wrote: Tom Lane wrote: No, not at the moment. In principle the planner could look for such duplicates, but it'd be wasted cycles so much of the time that I'd be loath to do it. Good point - there are better places to spend time, and I imagine it'd be an expensive thing to check

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Justin Graf
I did not run into one install problem, I read a thread about people having problems but the thread is over a year old now. I used the 7.1 gutsy amd64 server version I then installed gnome desktop because its not installed by default. "i'm a windows admin i have to have my gui" then instal

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Will Weaver
Justin, This may be a bit out of context, but did you run into any troubles getting your Perc6i RAID controller to work under Ubuntu 7.1? I've heard there were issues with that. Thanks, Will On Mar 13, 2008, at 3:11 AM, Justin Graf wrote: I recent just got a new server also from dell 2

Re: [PERFORM] ER diagram tool

2008-03-13 Thread A. Kretschmer
am Thu, dem 13.03.2008, um 18:54:18 +0530 mailte sathiya psql folgendes: > Is there any tool to draw ER diagram from SQL schema file... > 14:31 < akretschmer> ??erd 14:31 < rtfm_please> For information about erd 14:31 < rtfm_please> see http://druid.sf.net/ 14:31 < rtfm_please> or http://schemas

[PERFORM] ER diagram tool

2008-03-13 Thread sathiya psql
Is there any tool to draw ER diagram from SQL schema file... no other groups are replying.

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Doug Knight
All, I am in the process of specing out a purchase for our production systems, and am looking at the Dell 2950s as well. I am very interested to see where this thread goes, and what combinations work with different application loading types. Our systems will have one pair of heartbeat-controlled, d

[PERFORM] Recomendations on raid controllers raid 1+0

2008-03-13 Thread Glyn Astill
Hi chaps, I'm looking at switching out the perc5i (lsi megaraid) cards from our Dell 2950s for something else as they're crap at raid 10. Thing is I'm not entirely sure where to start, we're using 6 SAS drives and also need a bbu cache. The perc5i has 256mb which I'm sure would be fine for us. W

Re: [PERFORM] Benchmark: Dell/Perc 6, 8 disk RAID 10

2008-03-13 Thread Justin Graf
I recent just got a new server also from dell 2 weeks ago went with more memory slower CPU, and smaller harddrives have not run pgbench Dell PE 2950 III 2 Quad Core 1.866 Ghz 16 gigs of ram. 8 hard drives 73Gig 10k RPM SAS 2 drives in Mirrored for OS, Binaries, and WAL 6 in a

Re: [PERFORM] partial index + select query performance

2008-03-13 Thread A. Kretschmer
am Thu, dem 13.03.2008, um 12:51:54 +0530 mailte petchimuthu lingam folgendes: > > I have created partial index on a field with conditions, if field _a > 200 > and field_a < 300. > > I using the select query with condition as field_a in ( 100, 250, 289, ), > > Will it use the index. Why do

[PERFORM] partial index + select query performance

2008-03-13 Thread petchimuthu lingam
I have created partial index on a field with conditions, if field _a > 200 and field_a < 300. I using the select query with condition as field_a in ( 100, 250, 289, ), Will it use the index. -- With Best Regards, Petchimuthulingam S