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PostgreSQL > pgsql-hackers > September 2005

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161 discussions - 1,464 posts

  • As a thought exeriment, I've been considering the best way to sort 1TB (2^40B) of 2-4KB (2^11-2^12B) records. That's 2^28-2^29 records. Part I: A Model of the System The performance of such external ...
    Ron PeacetreeRon Peacetree
    Sep 26, 2005 at 5:47 pm
    Oct 8, 2005 at 10:51 pm
  • The test case I just posted shows that our spinlock code, which we had thought largely done, is once again becoming a performance bottleneck. It's time to resurrect some of the ideas we kicked around ...
    Tom LaneTom Lane
    Sep 11, 2005 at 9:59 pm
    Jun 15, 2006 at 2:59 am
  • I've committed changes to implement the cut-down form of this proposal: http://archives.postgresql.org/pgsql-hackers/2005-08/msg01185.php discussed here: ...
    Tom LaneTom Lane
    Sep 6, 2005 at 12:24 am
    Sep 9, 2005 at 5:40 am
  • Hi Hackers, I think it would be a waste to retain xmin and cmin for frozen tuples because their values represent only 'visible for all transactions'. Additionally, most tuples in database can be ...
    ITAGAKI TakahiroITAGAKI Takahiro
    Sep 1, 2005 at 1:46 am
    Sep 16, 2005 at 4:48 pm
  • Nathan wagnerNathan wagner
    Sep 6, 2005 at 12:47 pm
    Sep 8, 2005 at 5:25 pm
  • Let table A be inherited by A1, A2, A3. How to select from A records where actual relations are A1, A2 ? I found a way somewhere, it sounds like SELECT : WHERE tableoid IN (a1.oid, a2.oid), but ...
    Ilia KantorIlia Kantor
    Sep 27, 2005 at 6:05 pm
    Oct 4, 2005 at 2:33 pm
  • One regular topic of conversation on IRC and elsewhere is that the settings initdb installs especially for memory use, connections, and so on, are often very conservative. Of course, we tell people ...
    Andrew DunstanAndrew Dunstan
    Sep 7, 2005 at 11:05 pm
    Sep 11, 2005 at 5:20 pm
  • hackers, currently we have to hack tons of export scripts for various customers. the problem is: if tables can be exported straight forward COPY will give you all you need but when data has to be ...
    Hans-Jürgen SchönigHans-Jürgen Schönig
    Sep 21, 2005 at 1:30 pm
    Sep 22, 2005 at 11:32 pm
  • ::regclass just seems too low-level to be something we should recommend. We have tried to move away from :: casts in the default clauses. What really concerns me is that for the most common case, ...
    Bruce MomjianBruce Momjian
    Sep 28, 2005 at 3:25 pm
    Oct 1, 2005 at 9:13 pm
  • Here are the open items for 8.1: PostgreSQL 8.1 Open Items ========================= Current version at http://candle.pha.pa.us/cgi-bin/pgopenitems or from http://www.postgresql.org/developer/beta. ...
    Bruce MomjianBruce Momjian
    Sep 26, 2005 at 4:49 pm
    Oct 1, 2005 at 12:04 am
  • I had originally been planning to back-port this fix: http://archives.postgresql.org/pgsql-committers/2005-08/msg00213.php as far as 7.2. I've completed the back-port as far as 7.3, but found that ...
    Tom LaneTom Lane
    Sep 26, 2005 at 9:57 pm
    Sep 30, 2005 at 11:12 pm
  • Supports any glibc platform and possibly Win32. Adds: SELECT ... ORDER BY expr COLLATE 'locale' CREATE INDEX locale_index ON table(expr COLLATE 'locale') Index scan used when COLLATE order permits ...
    Martijn van OosterhoutMartijn van Oosterhout
    Sep 2, 2005 at 1:04 pm
    Jun 14, 2006 at 6:49 pm
  • Hi, I've installed PostgreSQL 8.1-beta2 as a service on my Windows-XP box. It runs fine but I get repeated messages like this in the log: 2005-09-29 00:41:09 FATAL: could not duplicate socket 1880 ...
    Thomas HallgrenThomas Hallgren
    Sep 29, 2005 at 6:50 am
    Oct 12, 2005 at 2:35 pm
  • Inserting into a time field with limited precision rounds off, which is good except for this case: regression=# select '23:59:59.9'::time(0); time ---------- 24:00:00 (1 row) This is bad because: ...
    Tom LaneTom Lane
    Sep 25, 2005 at 5:26 pm
    Nov 4, 2005 at 9:15 pm
  • Hi, PostgreSQL's grammer allows you to specify the operator to sort with in the ORDER BY clause. Various bits of the backend support this feature, yet it appears to partially undocumented. I can't ...
    Martijn van OosterhoutMartijn van Oosterhout
    Sep 18, 2005 at 5:20 pm
    Sep 20, 2005 at 11:22 am
  • My company has written a 64-bit large object API, extending the postgresql server to be able to read/write/seek/tell/open/close objects larger than 2GB. If the hackers community considers this ...
    Mark DilgerMark Dilger
    Sep 18, 2005 at 4:16 pm
    Jun 14, 2006 at 7:33 pm
  • Tomorrow afternoon, we are planning on packaging up Beta2 .. if anyone is sitting on something that should get in before that happens, or has a bug they are sitting on, please let us know ... I am ...
    Marc G. FournierMarc G. Fournier
    Sep 16, 2005 at 12:09 am
    Sep 19, 2005 at 7:05 pm
  • I have concerns about whether we are overallocating memory for use in external sorts. (All code relating to this is in tuplesort.c) When we begin a sort we allocate (work_mem | maintenance_work_mem) ...
    Simon RiggsSimon Riggs
    Sep 23, 2005 at 9:37 am
    Sep 26, 2005 at 5:17 pm
  • Dear Sirs I know that that postgresql can be configured for high availability over a clustered environment using pgcluster, I am currently studying in my masters the clustering using MPI and OpenMP, ...
    Rafik SalamaRafik Salama
    Sep 21, 2005 at 5:01 pm
    Sep 30, 2005 at 9:40 pm
  • pg_config doesn't currently seem to have an option to report the share_dir. Should it? cheers andrew
    Andrew DunstanAndrew Dunstan
    Sep 7, 2005 at 9:34 pm
    Sep 26, 2005 at 7:11 pm
  • [Hackers now seems more appropriate] Well, the spec seems to get out of this simply. I read SQL2003's trigger execution information (specifically 14.27 GR5g*) to say that before triggers that call ...
    Stephan SzaboStephan Szabo
    Sep 3, 2005 at 5:16 am
    Jun 14, 2006 at 6:36 pm
  • Would it be difficult to vacuum as part of a dump? The reasoning behind this is that you have to read the table to do the dump anyway, so it would be a good time to be able to piggy-back other ...
    Jim C. NasbyJim C. Nasby
    Sep 25, 2005 at 12:17 am
    Sep 30, 2005 at 10:18 pm
  • Hi, I tried to compile PL/Java against PostgreSQL 8.1beta2. I use pgxs and until now that has been just fine. Now pgxs suggests that the include files reside under /usr/local/pgsql. They don't of ...
    Thomas HallgrenThomas Hallgren
    Sep 21, 2005 at 10:11 pm
    Sep 23, 2005 at 3:02 pm
  • Hi Hackers, PostgreSQL can treat variable-length data flexibly, but therefore it consumes more spaces if we store short data. Headers of variable-length types use 4 bytes regardless of the data ...
    ITAGAKI TakahiroITAGAKI Takahiro
    Sep 8, 2005 at 9:04 am
    Jun 15, 2006 at 3:05 am
  • Hi, consider this function: CREATE OR REPLACE FUNCTION FIND_USER_SOCKET_BYNAME ( IN IN_USERNAME VARCHAR, OUT OUT_SOCKET_ADDRESS INTEGER) AS $BODY$ BEGIN select socket_address from userdata where ...
    Tony CadutoTony Caduto
    Sep 28, 2005 at 7:10 pm
    Oct 1, 2005 at 8:57 am
  • Hi, I'm trying to compile Postgresql 8.1 beta on my own in mingw/windows. I tried to compile it with --with-bonjour but it is looking for the wrong file, it looks for "DNSServiceDiscovery.h" but ...
    PmagnoliPmagnoli
    Sep 8, 2005 at 11:10 am
    Sep 16, 2005 at 5:37 pm
  • I have a client with a database that contains 4000 relations according to vacuum verbose, and \d in psql is painfully slow. In particular... - Seq Scan on pg_class c (cost=0.00..2343.09 rows=6124 ...
    Jim C. NasbyJim C. Nasby
    Sep 24, 2005 at 11:59 pm
    Oct 4, 2005 at 2:17 pm
  • I looked at the recently noted problem that pgxs builds only work if the installation paths recorded in Makefile.global are accurate; which pretty much breaks our claim to supporting relocatable ...
    Tom LaneTom Lane
    Sep 27, 2005 at 12:12 am
    Sep 28, 2005 at 1:59 pm
  • I am puzzled about this. The strace output below is from CVS tip and shows the postmaster and children during a single (local) connection when the auth method is md5. What we see is 2 calls to ...
    Andrew DunstanAndrew Dunstan
    Sep 22, 2005 at 1:10 am
    Sep 24, 2005 at 11:07 pm
  • Table Partitioning is in 8.1 I've just read Peter Eisentraut's presentation to the Dutch gov (very good BTW). On the last page I read that Table Partitioning is a future for PostgreSQL....which is ...
    Simon RiggsSimon Riggs
    Sep 21, 2005 at 5:10 pm
    Sep 23, 2005 at 4:35 pm
  • Is there an HTML standard that we try to follow in our HTML docs such as FAQs? If there isn't an explicit standard, may I suggest that we adopt XHTML 1.0 as the standard? Also, I notice non-breaking ...
    Andrew DunstanAndrew Dunstan
    Sep 10, 2005 at 4:10 pm
    Sep 11, 2005 at 3:32 pm
  • How does Index scan perform a scan for overlapping Index Cond ? If I get a plan like this, what will actually be performed if EXPLAIN shows this: Sort (cost=12.90..12.91 rows=1 width=207) Sort Key: ...
    Hannu KrosingHannu Krosing
    Sep 2, 2005 at 6:36 am
    Sep 4, 2005 at 11:29 pm
  • Ilya Kovalenko posted some code at in a thread starting at http://archives.postgresql.org/pgsql-hackers/2005-04/msg00417.php which lead to the TODO item: * Allow INET + INT4 to increment the host ...
    Patrick WelchePatrick Welche
    Sep 5, 2005 at 6:25 pm
    May 1, 2006 at 12:55 pm
  • Folks, I've run into something that concerns me. It's pretty much an 8.2 issue, but I'm hoping to stimulate some discussion on it. It's PostgreSQL's log files. Right now, they're (sometimes just ...
    David FetterDavid Fetter
    Sep 26, 2005 at 4:58 pm
    Oct 1, 2005 at 3:43 pm
  • I plugged a storage array that was initialized with ia32 and attached it to an amd64 machine. The postmaster complained at startup that such-and-such magic value was incorrect and refused to start. ...
    Jeffrey W. BakerJeffrey W. Baker
    Sep 26, 2005 at 10:47 pm
    Sep 30, 2005 at 11:14 pm
  • I have added a section to the top of the WAL docs explaining caching and reliability issues: http://candle.pha.pa.us/main/writings/pgsql/sgml/reliability.html I also renamed the chapter "Reilability" ...
    Bruce MomjianBruce Momjian
    Sep 28, 2005 at 6:26 pm
    Sep 29, 2005 at 3:17 pm
  • Hey everyone, Evgen Potemkin has granted me a BSD license on the patch for hierarchical queries (WITH and CONNECT BY) and I'd like to get it on track for PostgreSQL 8.2. Tom, Bruce, Simon, Alvaro, ...
    Jonah H. HarrisJonah H. Harris
    Sep 22, 2005 at 3:19 pm
    Sep 22, 2005 at 10:18 pm
  • Currently, when we set a statement_timeout and a query runs over that time there is no log message to say that the statement has timed out. We do get a message which says ERROR: canceling query due ...
    Simon RiggsSimon Riggs
    Sep 9, 2005 at 11:55 am
    Sep 21, 2005 at 7:10 pm
  • Hi, All. Has anyone successfully built PostgreSQL from source using MinGW? Anyone have step-by-step instructions on how to do this? I am willing to write the documentation on this if I can just get ...
    Lee, Patricia S.Lee, Patricia S.
    Sep 7, 2005 at 6:32 pm
    Sep 10, 2005 at 5:28 am
  • [ redirected to -hackers, where it's actually on topic ] Matt Miller <mattm@epx.com writes: The reason you aren't going to be able to manage this in the current state of plpgsql is that plpgsql ...
    Tom LaneTom Lane
    Sep 1, 2005 at 10:28 pm
    Sep 2, 2005 at 9:09 pm
  • Hi, I see this TODO item: * %Set proper permissions on non-system schemas during db creation I think a quetion here is wich are non-system schemas? i guess "public" is one of these... but in ...
    Jaime CasanovaJaime Casanova
    Sep 1, 2005 at 1:42 am
    Sep 1, 2005 at 6:02 pm
  • Folks, Well, it took a while but I finally have the results of Satoshi's PCTFree patch back from the STP. Bad news about the STP, see below ... Anyway, a series of DBT2 runs doesn't seem to show any ...
    Josh BerkusJosh Berkus
    Sep 22, 2005 at 8:57 pm
    Nov 19, 2005 at 8:38 pm
  • Hi, I have a problem with PL/Java that, if it's going to have a good solution, requires your help. PL/Java runs a JVM. Since a JVM is multi threaded, PL/Java goes to fairly extreme measures to ensure ...
    Thomas HallgrenThomas Hallgren
    Sep 23, 2005 at 11:19 am
    Sep 25, 2005 at 11:14 am
  • Hackers, I'm reading the vacuum code and I just noticed that the routines move_plain_tuple and move_chain_tuple expect the dest and source blocks to be locked, and unlock them at exit. The only ...
    Alvaro HerreraAlvaro Herrera
    Sep 16, 2005 at 4:38 pm
    Sep 22, 2005 at 5:15 pm
  • One problem is that DISTINCT ON is defined to return the first unique row (according to the query's ORDER BY) for the set of DISTINCT ON columns, which can't easily be done via hashing. -Neil
    Neil ConwayNeil Conway
    Sep 19, 2005 at 2:51 pm
    Sep 20, 2005 at 11:13 pm
  • I worked with Jim Nasby and we found this is the line that is failing on Gerbil in the build farm during initdb: tqual.c, line 844 in 8.0.X if (HeapTupleHeaderGetCmin(tuple) = snapshot- curcid) This ...
    Bruce MomjianBruce Momjian
    Sep 20, 2005 at 5:17 pm
    Sep 27, 2005 at 10:33 pm
  • I have been writing a PQ client and I have come to think that a "supported PQ versions request startup packet" would be useful to client authors. That is, sending a StartupPacket(Version(0, 0))(or ...
    James William PyeJames William Pye
    Sep 8, 2005 at 12:31 am
    Sep 8, 2005 at 9:27 pm
  • A release or two ago we added the version number to the psql welcome banner. I noticed that quite a few people interpret that as the server version. Somehow, the explicit display of the version ...
    Peter EisentrautPeter Eisentraut
    Sep 1, 2005 at 3:31 pm
    Sep 2, 2005 at 5:38 am
  • Am trying to port a mysql statement to postgres. Please help me in finding the error in this, CREATE SEQUENCE ai_id; CREATE TABLE badusers ( id int DEFAULT nextval('ai_id') NOT NULL, UserName ...
    R, Rajesh (STSD)R, Rajesh (STSD)
    Sep 29, 2005 at 1:05 pm
    Oct 5, 2005 at 9:04 am
  • Hi All, Can anyone please tell/point me where I can get the postgresql system layout (I've an interest to contribute). I would also like to know the files involved for performing each task ( for eg ...
    Gnanavel SGnanavel S
    Sep 27, 2005 at 9:50 am
    Sep 30, 2005 at 11:19 pm
Sep 2005
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159 users for September 2005

Tom Lane: 297 posts Bruce Momjian: 111 posts Jim Nasby: 65 posts Andrew Dunstan: 60 posts Alvaro Herrera: 57 posts Peter Eisentraut: 52 posts Martijn van Oosterhout: 51 posts Josh Berkus: 43 posts Dave Page: 31 posts Thomas Hallgren: 30 posts Jonah H. Harris: 28 posts Simon Riggs: 28 posts Greg Stark: 24 posts Joshua D. Drake: 23 posts Hannu Krosing: 19 posts Magnus Hagander: 18 posts Ron Peacetree: 17 posts Michael Paesold: 15 posts Neil Conway: 14 posts Patrick Welche: 14 posts
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