threads listlengths 1 275 |
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[
{
"msg_contents": "Folks, \n\nConsider this performance quandry brought to me by Elein, which I can replcate \nin 7.2.3 and in 7.4 devel:\n\ncase_clients is a medium-large table with about 110,000 rows. The field \ndate_resolved is a timestamp field which is indexed and allows nulls (in \nfact, is null for 40%... |
[
{
"msg_contents": "Thank you for a good workaround.\n\nEven BETTER would be to fix the aggregates so workarounds wouldn't have to\nbe found.\n\nThanks again,\n\nL.\nOn Fri, 13 Dec 2002, Josh Berkus wrote:\n\n> \n> \n> ---------- Forwarded Message ----------\n> \n> Subject: Re: [PERFORM] Odd Sort/Limit/Max Pro... |
[
{
"msg_contents": "I have been trying tune joins against a view we use a lot for which\nthe optimizer generates very poor query plans when it uses the GEQO.\nThe long involved version (and more readable version) of the problem\nis here: http://xarg.net/writing/misc/GEQO\n\nI have tried doing a variety of explic... |
[
{
"msg_contents": "Folks,\n\nI had a request from one of the SF-PUG members that I found\ninteresting. She suggested that we post the specs of some of the\nPostgreSQL servers that we administrate, their statistics, and some\ncomments on how they perform. I'll start it off with an example:\n\nSmall Cheap Workg... |
[
{
"msg_contents": "Hi\nFew days ago I read, that EXISTS is better than IN, but only if there \nare many records (how many?). I was wondering which one is better and \nwhen. Did anyone try to compare these queries doing the same work:\n\n- select * from some_table t\n where t.id [not] in (select id from filt... |
[
{
"msg_contents": "On Thu, 19 Dec 2002 14:10:58 -0500, george young <gry@ll.mit.edu>\nwrote:\n>with 4 billion(4e9) rows. I would guess to make wafer, die_row, etc. be of\n>type \"char\", probably testtype a char too with a separate testtype lookup table.\n>Even so, this will be a huge table.\n\nDon't know if y... |
[
{
"msg_contents": "Hello,\n\nWe are considering switching our systems over from MySQL to Postgresql.\n\nSpeed is one of our major concerns, so before switching we've decided \nto perform some speed tests.\n From what I understand, Postgresql is NOT as fast as Mysql, but should \nbe close enough.\n\nWe've instal... |
[
{
"msg_contents": "First: THANK YOU everyone for all your suggestions.\n\nI've discovered the \"copy from\" command and it helps a lot.\nRight now, we just ran a test on 1MM rows with 4 columns and it is very \nfast with a 4 column index. Works well.\n\nNow we are creating more of a real world example: 10MM ... |
[
{
"msg_contents": "I was looking at some queries that appeared to be slower than I remembered\nthem being under 7.2 (which may be a wrong perception) and noticed\nthat a view wasn't being handled very efficiently.\n\nThe view is security view that is used to hide some fields in some records\nwhen displaying inf... |
[
{
"msg_contents": "Hello, \n\nI'm facing to a performance problem, when I run PostgreSQL 7.\n2.1 + RedHat Linux 7.3 on a Xeon Dual CPU machine.\n\nCompared with a P4 2.4GHz machine, pgbench shows 1/10 on the \nXeon machine (detail is describled below), while hdparm \nshows 2 times faster.\n\nDisabling HTT had n... |
[
{
"msg_contents": "\nHi,\n As we can see all tuples of a child table when scanning parent table,\nI'm confused about if that means there are two copies that are stored on\ndisk, one is for child table, and the other for parent table? If so,\nI have to reconsider the size of my database.\n Thanks.\n\nLi Li\n... |
[
{
"msg_contents": "Howdy.\n\nI've used PostgreSQL in the past on a small project,\nand I thought it was great.\n\nNow I'm trying to evaluate it as a possible\nreplacement for MS SQL Server.\n\nI have two issues:\n\n1. I have a homegrown Java migration tool I wrote that\nseems to work reasonably well, but I'm ho... |
[
{
"msg_contents": "Hi all,\n\nI've experienced very slow performance to add foreign key constraints using \nALTER TABLE ADD CONSTRAINT FOREIGN KEY ...\n\nAfter using COPY ... FROM to load the base tables, I started to build the \nreferential integrity between tables.\nI have 3 tables: T1 (6 million records), T2... |
[
{
"msg_contents": "Hi all,\n\nI've experienced very slow performance to add foreign key constraints using \nALTER TABLE ADD CONSTRAINT FOREIGN KEY ...\n\nAfter using COPY ... FROM to load the base tables, I started to build the \nreferential integrity between tables.\nI have 3 tables: T1 (6 million records), T2... |
[
{
"msg_contents": "Roman Fail wrote:\n> The same result columns and JOINS are performed all day with variations on the WHERE clause;\nAre there any where clauses which all of theses variation have?\nIf yes - query can be reordered to contain explicit joins for these clauses and \nto let Postgres to find best so... |
[
{
"msg_contents": "On Tue, 31 Dec 2002 14:14:34 -0800 (PST)\nMichael Teter <mt_pgsql@yahoo.com> wrote:\n> I've used PostgreSQL in the past on a small project,\n> and I thought it was great.\n> \n> Now I'm trying to evaluate it as a possible\n> replacement for MS SQL Server.\n> \n> I have two issues:\n> \n> 1. I... |
[
{
"msg_contents": "\n Well, our current database server is getting tremendously loaded, and\nright now there isn't a clear-cut choice as to an upgrade path - at least\nnot within the commodity hardware market.\n\n The machine is a dual AthlonMP 2000, with 2 gigs of RAM. the loads on\nthe machine are getting ... |
[
{
"msg_contents": "I have a query generated by an application (not mine, but there's \nnothing I can find that looks bad about the query itself) that takes an \nexcessive amount of time to return even though there are almost no rows \nin the schema yet. 3 secs may not seem to be much, but the query is run \nby ... |
[
{
"msg_contents": "Hi!\n I'm developing a small application which I'd like to be as fast as\n possible. The program simply receives an order by modem and has to give an\n answer with the products my enterprise will be able to send them. The number\n of products could be as much as 300-400 and I don't want to m... |
[
{
"msg_contents": "Hi\n1. I have plpgsql function having only one query returning 1 value. This \nquery joins some tables. I read, that plpgsql function saves execution \nplan for all queries inside one database connection.\n\n2. Instead of this I can create a view returning one row. How does \npostgres work wi... |
[
{
"msg_contents": "> -----Original Message-----\n> From: Tom Lane [mailto:tgl@sss.pgh.pa.us] \n> Sent: Monday, January 06, 2003 7:30 PM\n> To: Dann Corbit\n> Cc: pgsql-hackers@postgresql.org; pgsql-general@postgresql.org\n> Subject: Re: [GENERAL] PostgreSQL and memory usage \n> \n> \n> \"Dann Corbit\" <DCorbit@... |
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{
"msg_contents": "Achilleus Mantzios wrote:\n<cut>\n\n > it has indexes:\n > Indexes: noonf_date btree (report_date),\n > noonf_logno btree (log_no),\n > noonf_rotation btree (rotation text_ops),\n > noonf_vcode btree (v_code),\n > noonf_voyageno btree (voyage_no)\n >\n<cut>... |
[
{
"msg_contents": "Hi all,\n\nHow is this path created without the (.profile)? \n\n$ echo $PATH\n/usr/local/bin:/usr/bin:/bin:/cygdrive/c/amtagent:/cygdrive/c/informix/bin:/cygd\nrive/c/winnt:/cygdrive/c/winnt/system:winnt/system32:/cygdrive/c/Windows:/cygdri\nve/c/Windows/command:C:jdk1.2.2/bin\n\nHow can I ad... |
[
{
"msg_contents": "Hello!\n\nI am quite new in the PostgreSQL performance business, done a few years Oracle \nstuff before. My ist question is the following:\n\nWe have three table, lets name them rk150, 151 and rk152. They all have a \ntimestamp and a order number in common but than different data after this. ... |
[
{
"msg_contents": "Hello to all list members:\n\nI'm looking for information about using postgresql in a cluster of servers\nwhere all real servers share a unique databases location outside them.\n\nThe question could be one of the follows?\n\n?Is the prostgresql prepared to synchronize simultaneous accesses to... |
[
{
"msg_contents": "On Wed, 2003-01-08 at 19:49, enediel wrote:\n> Thanks for all answers:\n> Ron Johnson, I mean the second option thet you wrote:\n> \n> (2) multiple application server machines all hitting a single database\n> sitting on a single database server machine?\n\nOk, great. To the PG server, the ap... |
[
{
"msg_contents": "On Thu, 9 Jan 2003, enediel wrote:\n\n> No, pginfo, suposse this example\n> \n> Web server or cluster web server, it's unimportant\n> |\n> Postgresql cluster server containing{\n> ...\n> Real server 1 running postgresql processes\n> Real server 2 running postgresql processe... |
[
{
"msg_contents": "Thanks for the answer scott.marlowe\nI'm agree with you about the limit of the I/O operations with this\nconfiguration.\n\nI'm just looking for a fault tolerance configuration in the databases\nserver, considering a very large databases, and a lot of users accesing to\nthem.\n\nI'll accept wi... |
[
{
"msg_contents": "\nWhich query statement is better in terms of preformance ?\n\nselect ... from table1 where field1 in ('a', 'b', 'c')\n\nselect ... from table1 where field1='a' or field1='b' or field1='c'\n\nThanks.\n\n\n",
"msg_date": "Sat, 11 Jan 2003 10:51:44 -0800",
"msg_from": "Vernon Wu <verno... |
[
{
"msg_contents": "Folks,\n\nCan someone give me a quick pointer on where the ANALYZE stats are kept in \n7.2.3? Thanks.\n\n-- \n-Josh Berkus\n Aglio Database Solutions\n San Francisco\n\n",
"msg_date": "Mon, 13 Jan 2003 10:42:01 -0800",
"msg_from": "Josh Berkus <josh@agliodbs.com>",
"msg_from_op"... |
[
{
"msg_contents": " Tomasz,\n\n> What happens to view planning - is it performed \n> during view creation, or rather each time view is quered?\n\nEach time the view is executed. The only savings in running a view over a \nregular query is that the view will have taken care of some reference \nexpansion and JO... |
[
{
"msg_contents": "Short Version:\n\nI've read the idocs and Notes and Googled a fair amount, honest. :-)\n\nWhat's the most efficient way of determining the number of rows in a\ncursor's result set if you really *DO* need that? (Or, rather, if your\nclient specifically asked for features that require that.)\n... |
[
{
"msg_contents": "\nNoah,\n\n> Can someone give me a good description of what the various directories \n> and files actually are. I have RTFMed, but the descriptions there \n> don't seem to match what I have on my machine.\n\nWithin $PGDATA:\n\n/base is all database files unless you use WITH LOCATION\n/pg_clo... |
[
{
"msg_contents": "Hello,\n\nI'm having some serious performance issues with PostgreSQL on\nour newish SunFire 280R (1 900MHz ultrasparc III, 1 GB RAM). \nIt's painfully slow. It took me almost a week of tuning to get\nit in the range of an old Mac G3 laptop. Now, a few days later,\nafter tweaking every nearl... |
[
{
"msg_contents": "Roman,\n\nFirst, if this is a dedicated PostgreSQL server, you should try increasing \nyour shared_buffers to at least 512mb (65536) if not 1GB (double that) and \nadjust your shmmax and shmmall to match.\n\nSecond, you will probably want to increase your sort_mem as well. How much \ndepened... |
[
{
"msg_contents": "In my current project, among of over twenty main tables, three of them are the master tables and result are the \nmultivalued detail tables. All of those table have the field name userid which is varchar data type.\n\nA selection statement, having a level of subquery, can involve up to twenty... |
[
{
"msg_contents": "***********************\r\n> Josh Berkus wrote:\r\n> Hey, Roman, how many records in BatchDetail, anyway?\r\n\r\n23 million.\r\n \r\n***********************\r\n> Stephan Szabo wrote:\r\n> What does vacuum verbose batchdetail give you (it'll give an idea of pages anyway)\r\n\r\ntrans=# VACUUM ... |
[
{
"msg_contents": "All,\n\nI just noted in another thread that use of foreign keys in postgres\nsignificantly hinders performance. I'm wondering what other aspects we should\ntake into consideration in the design of our database. We're coming from\nSybase and trying to design a more encompassing, modular, gen... |
[
{
"msg_contents": "I think FK on every database (oracle and MSSQL too) may hit performance,\nbut only in DML (insert/update/delete). These are tradeoffs...\nreferencial integrity vs. problems with batchload for example.\nMy Oracle experience say when I need to do batchload, I disable\nconstraints and then apply... |
[
{
"msg_contents": "> Josh Berkus wrote:\r\n> And MSSQL is returning results in 3 seconds? I find that a bit hard\r\n> to believe, unless this query is called repeatedly and that's the\r\n> figure for the last call, where the records are being cached. I'll\r\n> have to look at your hardware descriptions aga... |
[
{
"msg_contents": "Tom and Tomasz:\r\nI have to change the datatype of batchdetail.batchid from int4 to int8. After over 4 hours, the UPDATE transfer from the old column to new has not yet completed. After that I still have to build a new index and run VACUUM FULL. When that is all done I'll re-run the vario... |
[
{
"msg_contents": "Hi, everyone!\n\nI have a simple query which takes almost 3 seconds to complete, but\ndisabling sequence scans leads to a new plan using index. This second\nplan takes less than 1 millisecond to run.\n\nSo, I'd like to hear any comments and suggestions.\n\nDetails.\n\nCREATE TABLE MediumStat... |
[
{
"msg_contents": ">> HOWEVER.....look at this:\r\n>> EXPLAIN ANALYZE select batchdetailid from batchdetail where batchdetailid = 27321::bigint;\r\n>> Index Scan using batchdetail_pkey on batchdetail (cost=0.00..4.13 rows=1 width=8) (actual time=0.03..0.03 rows=1 loops=1)\r\n>> Index Cond: (batchdetailid =... |
[
{
"msg_contents": "\nCan you do\nselect table2.f1, table1.name\nfrom table1,table2\nwhere table1.id =\ntable 2.id and table2.id = 2\nGROUP BY table2.f1, table1.name;\n\n\nPatrick Hatcher\nMacys.Com\nLegacy Integration Developer\n415-422-1610 office\nHatcherPT - AIM\n\n\n\n\n ... |
[
{
"msg_contents": "I have a table which is rather wide (~800 columns) and consists of a few \ncolumns of identifying data (run time, channel and such) and up to several \nhundred columns of collected data (no, normalization does not suggest putting \ncollected data in another table - collected item 1 always cor... |
[
{
"msg_contents": "Hi,\n\nWill there be any advantages to running Pg on a 64-bit CPU rather\nthan 32-bit?\n\nThe recent discussions in the \"7.3.1 New install, large queries are\nslow\" thread make me think not, since Pg says that the OS can manage\nbuffers better:\n<QUOTE From=\"Tom Lane <tgl@sss.pgh.pa.us>\">... |
[
{
"msg_contents": ">> It sort of feels like a magic moment. I went back and looked through a\r\n>> lot of the JOIN columns and found that I was mixing int4 with int8 in a\r\n>> lot of them.\r\n\r\n>There is note about it in the docs:\r\n>http://www.postgresql.org/idocs/index.php?datatype.html#DATATYPE-INT\r\n>... |
[
{
"msg_contents": "> Jochem van Dieten wrote:\r\n> Just out of curiosity and for archiving purposes, could you post the new\r\n> EXPLAIN ANALYZE output to the list?\r\n\r\nTo reiterate, the batchdetail table is 24 million rows, batchheader is 2.7 million, and purc1 is 1 million. The rest are 2000 rows or less.... |
[
{
"msg_contents": "subscribe\n\n",
"msg_date": "Tue, 21 Jan 2003 09:40:13 +1000",
"msg_from": "Rudi Starcevic <rudi@oasis.net.au>",
"msg_from_op": true,
"msg_subject": "subscribe"
}
] |
[
{
"msg_contents": "I'm trying to get converted over to Postgres from Oracle (Postgres is\nbillions of times more straightforward and pragmatically clean than\nOracle), but I'm having some severe performance problems on what\nnaively appears to be a very straightforward dead-simple test.\n\nThe test is comprised... |
[
{
"msg_contents": "Hi:\n\n\n Has anyone done performance comparison between\ntriggers/functions in C vs. PL/PGSQL?\n\n What are the drawbacks of functions written using\nC?\n\n\nludwig.\n\n\n\n__________________________________________________\nDo you Yahoo!?\nNew DSL Internet Access from SBC & Yahoo!\nhttp... |
[
{
"msg_contents": "hello all,\n\nI am getting the following output from EXPLAIN, concerning a query with \njoins. The merge uses index scans but takes too long, in my opinion. The \nquery is in fact only a part (subquery) of another one, but it is the \nbottle neck.\n\nAs I am quite ignorant in optimizing queri... |
[
{
"msg_contents": "I have a table that contains over 13 million rows. This query takes an\nextremely long time to return. I've vacuum full, analyzed, and re-indexed\nthe table. Still the results are the same. Any ideas?\nTIA\nPatrick\n\nmdc_oz=# explain analyze select wizard from search_log where wizard\n='K... |
[
{
"msg_contents": "Sorry I'm being really dense today. I didn't even notice the 3.2 million\nrow being returned. :(\n\nTo answer your question, no, all fields would not have data. The data we\nreceive is from a Web log file. It's parsed and then uploaded to this\ntable.\n\nI guess the bigger issue is that wh... |
[
{
"msg_contents": "I have a database that makes fairly extensive use of table Inheritance.\n\nStructure is one parent table and 5 child tables as follows:\n\ntbl_objects (parent table)\n -> tbl_viewers\n -> tbl_documents\n -> tbl_icons\n -> tbl_massemails\n -> tbl_formats\n\nI have two questions:\n\nFirs... |
[
{
"msg_contents": "There's been some recent discussion about the fact that Postgres treats\nexplicit JOIN syntax as constraining the actual join plan, cf\nhttp://www.ca.postgresql.org/users-lounge/docs/7.3/postgres/explicit-joins.html\n\nThis behavior was originally in there simply because of lack of time to\nc... |
[
{
"msg_contents": "> -----Original Message-----\n> From: Tom Lane [mailto:tgl@sss.pgh.pa.us] \n> Sent: Wednesday, January 22, 2003 3:15 PM\n> To: Steve Crawford\n> Cc: pgsql-performance@postgreSQL.org; pgsql-hackers@postgreSQL.org\n> Subject: Re: [HACKERS] Terrible performance on wide selects \n> \n> \n> Steve ... |
[
{
"msg_contents": "Thanks everyone. I'll give your suggestions a try and report back.\n\nPatrick Hatcher\nMacys.Com\nLegacy Integration Developer\n415-422-1610 office\nHatcherPT - AIM\n\n\n\n\n ... |
[
{
"msg_contents": "> -----Original Message-----\n> From: Tom Lane [mailto:tgl@sss.pgh.pa.us] \n> Sent: Wednesday, January 22, 2003 4:04 PM\n> To: Dann Corbit\n> Cc: Steve Crawford; pgsql-performance@postgreSQL.org; \n> pgsql-hackers@postgreSQL.org\n> Subject: Re: [HACKERS] Terrible performance on wide selects \... |
[
{
"msg_contents": "> -----Original Message-----\n> From: Tom Lane [mailto:tgl@sss.pgh.pa.us] \n> Sent: Wednesday, January 22, 2003 4:18 PM\n> To: Dann Corbit\n> Cc: Steve Crawford; pgsql-performance@postgreSQL.org; \n> pgsql-hackers@postgreSQL.org\n> Subject: Re: [HACKERS] Terrible performance on wide selects \... |
[
{
"msg_contents": "[snip]\n> So (for instance) if you have 12 variable fields, you would \n> store 12 integers at the start of the record.\n\nAdditionally, you could implicitly size the integers from the properties\nof the column. A varchar(255) would only need an unsigned char to store\nthe offset, but a varc... |
[
{
"msg_contents": "[snip]\n> For the disk case, why not have the start of the record \n> contain an array of offsets to the start of the data for each \n> column? It would only be necessary to have a list for \n> variable fields.\n> \n> So (for instance) if you have 12 variable fields, you would \n> store 12 i... |
[
{
"msg_contents": "Hi all,\n\nFirst, sorry for the long mail...\n\nI have a system with 7 Million of records in 600 tables.\nMy actual production machine is: P4 1.6G, 3 IDE 7200, 1GB PC133\nMy new machine production is: Dual Xeon 2.0G HT, 1GB DDR266 ECC\n3 SCSI with HW Raid 5\n\nThe postgresql.conf is the SAME ... |
[
{
"msg_contents": "Hi!\n\nI have a table with year, month, day and hour fields (all SMALLINT\ntype). Selecting one row from it takes about 40 msecs, and I am\ntrying now to use DATE type instead of first three fields.\n\nNow select time decreased to less than millisecond, but I found that i\nmust use this form... |
[
{
"msg_contents": "To preface my question, we are still in the process of evaluating postgres \nto determine if we want to switch our production environment over.\n\nI'm curious about where I can find documentation about crash recovery in \npostgres. In mysql, there is a nice table recovery utility (myisamchk)... |
[
{
"msg_contents": "Folks,\n\nWhat mount options to people use for Ext3, particularly what do you set \"data \n= \" for a high-transaction database? I'm used to ReiserFS (\"noatime, \nnotail\") and am not really sure where to go with Ext3.\n\n-- \n-Josh Berkus\n Aglio Database Solutions\n San Francisco\n\n",
... |
[
{
"msg_contents": "Hi,\n\nWould LOCK TABLE ACCESS EXCLUSIVE MODE speed things up, when I have\na script that loads data by setting transactions, and then committing\nworks after every few thousand INSERTs?\n\nThanks,\nRon\n-- \n+---------------------------------------------------------------+\n| Ron Johnson, Jr... |
[
{
"msg_contents": "Hi all,\n\nHave you got any data (ie in percentage) of around how much more CPU\nwork needed with the bigserial type in the queries?\n\nI have a log database with 100million records (the biggest table\ncontains 65million records) and I use bigserial data type as primary key\nnow. The primary ... |
[
{
"msg_contents": "Due to reasons that everyone can probably intuit, we are porting a large \nserver application from IBM Informix to PG. However, things that take \nmilliseconds in IFX are taking HOURS (not joking) in PG. I *think* I \nmay have come across some reasons why, but I would like to see if anyone ... |
[
{
"msg_contents": "What I'm doing on V7.3.1:\n\nselect t1.keycol, t2.keycol\n from tab1 t1\n LEFT join myview t2 on t1.keycol=t2.keycol\nwhere t1.keycol=1000001\n\nt1 has 100 rows, t2 has 4000, both with keycol as PK.\n\nthe view is created as\nCREATE myview AS SELECT keycol, 22::integer as calc_col FROM tab... |
[
{
"msg_contents": "> I don't see how performance would be significantly better if you stored\n> the common columns of all rows (parent and children) in the parent\n> table, in contrast with how it is done now, storing entire rows of child\n> tables in the child table and omitting them from the parent table.\n\n... |
[
{
"msg_contents": "TEXT vs \"char\" ... vs BOOLEAN\n\nI am porting from Informix to PG. In doing so, I had to pick some data \ntypes for fields, and began wondering about the performance of char/text \nfields with one character. For example, I have a field which has one of \nthe following values/states: {'A',... |
[
{
"msg_contents": "\nGreetings to all, \n\nI have found strange query execution plans with the\nsame version of\nPostgreSQL but on different types of server machines.\nHere are the details\nof the servers:\n\nServer 1:\nPentium III, 800 MHz, 64 MB of RAM\nRedHat Linux 7.2, Postgres ver 7.1\n \nServer 2:... |
[
{
"msg_contents": "As we continue our evaluation of Postgres, another interesting topic \nhas come up that I want to run by the group.\n\nIn our current model, we have about 3,000 small tables that we use \ntrack data for our clients. Each table is an identical structure, and \nholds the data for one client.\n... |
[
{
"msg_contents": "On Thu, 30 Jan 2003, Gregory Wood wrote:\n\n> While you make an excellent point (i.e. you can't always through hardware,\n> especially excessive hardware at the problem), I would err on the side of\n> doing things the right way. It usually ends up making the software easier to\n> maintain and... |
[
{
"msg_contents": "I have a table which is very large (~65K rows). I have\na column in it which is indexed, and I wish to use for\na join. I'm finding that I'm using a sequential scan\nfor this when selecting a MIN.\n\nI've boiled this down to something like this:\n\n=> create table X( value int primary key );\... |
[
{
"msg_contents": "The query\n SELECT DISTINCT keycol, 'constant' FROM myTable\nor\n SELECT DISTINCT keycol, NULL FROM myTable\n\nwill result in an error message (7.3.1)\n\nUnable to identify an ordering operator '<' for type \"unknown\"\nUse explicit ordering operator or modify query\n\nIf I use 'constan... |
[
{
"msg_contents": "subscribe\n\n",
"msg_date": "Tue, 4 Feb 2003 16:48:53 +0200 (SAST)",
"msg_from": "<jeandre@itvs.co.za>",
"msg_from_op": true,
"msg_subject": "subscribe"
}
] |
[
{
"msg_contents": "While executing a lot of INSERTs and DELETEs, I had some performance \nproblems which seemed to result from missing foreign key indexes. \nUnfortunately, if doing an EXPLAIN DELETE myTab .... I'm getting only \nthe first stage of query plan, i.e. \"seq scan on myTab\". The database \naccesses... |
[
{
"msg_contents": "I've a new configuration for our web server\n\nProcessor\tProcesseur Intel Xeon 2.0 Ghz / 512 Ko de cache L2\nMemoiry\t1 Go DDR SDRAM\nDisk1\t18Go Ultra 3 (Ultra 160) SCSI 15 Ktpm \nDisk2\t18Go Hot Plug Ultra 3 (Ultra 160) SCSI 15 Ktpm \nDisk3\t18Go Hot Plug Ultra 3 (Ultra 160) SCSI 15 Ktpm \... |
[
{
"msg_contents": "I am interested in hearing from anyone that has used Postgres with the\ndb files existing on a SAN, fibre channel or iSCSI. I would be\ninterested in what hardware you used and what the performance ended up\nlike.\n\nThanking you in advance,\n\nKeith Bottner\nkbottner@istation.com\n\n\"Vegeta... |
[
{
"msg_contents": "I come from a Sybase background and have just started working with \nPostgre. Are there any books or tutorials that cover general performance \nissues for beginners? I don't just want to start creating databases and \ntables or writing mad queries without really understanding what is happenin... |
[
{
"msg_contents": "hi, i have to set up a postgres database on a\nsun enterprise 10000 machine running on solaris 8.\nhas anyone hints for tuning the database for me?\n\nregards\n-Chris\n-- \nIf Bill Gates had a penny for every time Windows crashed...\n..oh wait, he does.\n\n",
"msg_date": "Fri, 07 Feb 2003... |
[
{
"msg_contents": "When defining data types, which is better text, varchar or char? I heard \nthat on Postgres text is better, but I know on Sybase char is more efficient. \nCan someone please tell me whether this statement is true and if so why?\n\nMany Thanks\nJeandre\n\n",
"msg_date": "Tue, 11 Feb 2003 1... |
[
{
"msg_contents": "I've tested all the win32 versions of postgres I can get my hands on\n(cygwin and not), and my general feeling is that they have problems with\ninsert performance with fsync() turned on, probably the fault of the os.\nSelect performance is not so much affected.\n\nThis is easily solved with t... |
[
{
"msg_contents": "Hi Everyone,\n\nI've just spent the last day and a half trying to benchmark our new database\ninstallation to find a good value for wal_buffers. The quick answer - there\nisn't, just leave it on the default of 8.\n\nThe numbers just swing up and down so much it's impossible to say that one\n... |
[
{
"msg_contents": "Darryl A. J. Staflund wrote:\n\n>Hi Everyone,\n>\n>I am developing a JBoss 3.0.x application using PostgreSQL 7.2.3 as a\n>back-end database and Solaris 2.8 (SPARC) as my deployment OS. In this\n>application, I am using an EJB technology called Container Managed\n>Persistence (CMP 2.0) to ma... |
[
{
"msg_contents": "hello all,\n\nI am still fiddling around with my \"big\" database.\n\nSystem:\nRAM: 2GB\nCPU: 1,6 MHz (cache: 256 Kb)\nsingle disc: 120 GB :-(\n\nI have a query that joins to relatively large tables (10 - 15 Mio rows), \nor part of these tables (explain analyze: rows=46849) respectively.\n\nl... |
[
{
"msg_contents": "\"Darryl A. J. Staflund\" <darryl.staflund@shaw.ca> writes:\n> MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEH\n> AaCAJIAEggX+Q29udGVudC1UeXBlOiB0ZXh0L3BsYWluOw0KCWNoYXJzZXQ9\n> IlVTLUFTQ0lJIg0KQ29udGVudC1UcmFuc2Zlci1FbmNvZGluZzogN2JpdA0K\n> DQpIaSBldmVyeW9uZSwNCg0KVGhhbmtzIGZvci... |
[
{
"msg_contents": "Hello,\n\nI am going to do my best to describe this problem, but the description\nmay be quite long. Also, this is my first post to this list, so I miss\nimportant details please let me know. All of the following analysis was\ndone on my P4 laptop with 0.5 Gig ram and postgresql 7.3 install... |
[
{
"msg_contents": "Tom,\n Thanks for your help in this. We have some flexibility in the schema\ndesign; we are going through our first PostGres performance testing now.\nAm I correct in interpreting your comments as saying you believe that\nif we could lose the OR and the strand constraint PG would probab... |
[
{
"msg_contents": "Hello,\n\nWhile testing multi-select views I found some problems. Here are details. I have 3 tables and I created a view on them:\n\ncreate view view123 as\nselect key, value from tab1 where key=1\nunion all\nselect key, value from tab2 where key=2\nunion all\nselect key, value from tab3 wher... |
[
{
"msg_contents": "Hi,\n\nI have following tables:\n\nwith id as number(20,0):\nCREATE TABLE public.firm (\n firm_id numeric(20, 0) NOT NULL,\n name varchar(40) NOT NULL,\n CONSTRAINT firm_pkey PRIMARY KEY (firm_id)\n)\n\nwith id as int8:\n\nCREATE TABLE public.firmint8 (\n firmint8_id int8 NOT NULL,\n ... |
[
{
"msg_contents": "Ryan,\n\nI am crossing this discussion to the PGSQL-PERFORMANCE list, which is the \nproper place for it. Anyone interested, please follow us there!\n\n>>>Ryan Bradetich said:\n > the table would look like:\n > 1 | Mon Feb 17 00:34:24 MST 2003 | p101 | user x has an invalid shell.\n > 1 | M... |
[
{
"msg_contents": "Folks,\n\nI have a new system with an Adaptec 2200S RAID controller. I've been\ntesting some massive data transformations on it, and data write speed\nseems to top out at 3mb/second .... which seems slow to me for this\nkind of hardware. As it is, I have RAM and CPU sitting idle while they\... |
[
{
"msg_contents": "pgsql-hackers-owner@hub.org\nIf you bought into our last recommendation (CIMG) early enough you had an excellent opportunity to make substantial gains (from .90 to 1.65 in just the first day). Now is your chance to do the same with our newest pick: VICC. To find out more go to Live From the... |
[
{
"msg_contents": "\nhttp://www.sndfocus.biz/go.cgi/foryou\nhttp://www.foreverstore.cjb.net\n\nTerima kasih atas waktu yang Anda luangkan untuk membaca email ini. Siapa\ntahu, ini akan mengubah kehidupan anda.\n\nDalam kesempatan ini saya ingin memperkenalkan kepada Anda sebuah usaha\nsampingan yang bila Anda l... |
[
{
"msg_contents": "Hi\n\nI am doing some performance testing using postgresql. When measuring the\nlatency of commit I got some results, which make me doubt, if the logging\ndata is written to disk in time:\n\nUsing a slow disk (5400rpm) I measured about 3-5 ms for a commit. But\naverage rotational delay is alr... |
[
{
"msg_contents": "Hello,\n\nWe would like to use PostgreSQL for one project.\nThis project would need to handle some of 150000 - 200000 (thousands records) per day.\n\nIs there somebody having experience with Postgresql in this kind of environment.\nCan anybody advice us regarding specific PostgreSQL issues fo... |
[
{
"msg_contents": "I've use PostgreSQL for some pretty amazing things, and was a proponent\nof using it here. I set up 7.3.1 on my development RedHat 8 box, and it\nwas fine. I need to load about 700,000 rows into one table, the rows\nonly having 6 columns, and the load on my box happens in just a couple\nof ... |
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