Splitting A Very Large Table?
I have a InnoDB table that has about 17 normalized columns with ~6 million records. The size of the table is ~15GB. The queries from the table is starting to take too long and sometimes timeout/crash. I am thinking of splitting the table but am confused which way would be better. Do I split the columns into different tables on the same/different DB? Or do I split the rows of the table into another DB but then how would I know which row is where in the DB's.
View 1 Replies (Posted: Feb 13 at 15:42)
Sponsored Links:
Related Forum Messages for MySQL:
Large Table Splitting Into Several Parts?
I have a huge table in a database and I want to split that into several parts physically, maintaining the database scheme. For example, the table name is TableName and has 2 000 000 rows. I would like to split that table into four parts, but I want to work in the same way with the table, so select [Column List] from TableName where [Filter] insert into TableName ([Column List]) values([Values]) update TableName [Updates] where [Filter] delete from TableName where [filter] would work in the same way after splitting the table as before. Basically I want my database to handle in different threads my queries. How can I achieve this?
Posted: Sep 20 10 at 12:39
View 1 Replies!
View Related
Splitting Up DATETIME
I have 3 drop down menus that display the day (values 1-31), month (values 1-12, and year (2005-2008). I need to be able to search the database for an event on a specific date and order them by today and on. My row is called date and its column type is datetime. Is there any way I can split up the datetime so each drop down can search a portion of the date? I'm using php if that helps any.
Posted: March 3rd, 2005, 03:11 PM
View 5 Replies!
View Related
Splitting A Table
How would I go about splitting a table into two tables. Is there a way to do specifically this or is there a way to copy a single column into a new table (not manually one row at a time) and then I can delete it from the origional table?
Posted: September 07, 2006 06:18AM
View 2 Replies!
View Related
Splitting Into Quarter With Php And DB?
I have some blogposts and I want to create a link of archives. The link will go to a page that will only return results from a particular quarter, how do I do this with php and mysql? So I have a "date" field in a table and only want to return results from this quarter - e.g. the link to Quarter one will only return results from 1 Jan - 30th March. I could do this with a set of static queries and dates but I would like to do it a more programmatic way.
Posted: Feb 3 at 0:42
View 2 Replies!
View Related
Splitting Tables Efficiently
This is the second trivial question I have posted but it really is a question about efficiency which may not be obvious to new MySQL users such as myself. I have a large text file as a data source for a single table. The data is now too large to upload as it breaks my servers limit so now I am forced to split it into 2 identical tables with different data. I was planning on converting queries of the form SELECT * FROM t to SELECT * FROM t1 UNION ALL SELECT * FROM t2 but this doesn't strike me as particularly efficient , especially as I won't ever have data results spanning both tables (results will come from one table or the other because that's how I've chosen to split the data.
Posted: February 4th, 2008, 04:44 AM
View 6 Replies!
View Related
Splitting 1 Row Into Multiple Rows
Currently i have a select query which returns 1 row with 24 cells So for example item1 - item2 - item3 - item4 - ... - item24 What i want to do is split this into multiple rows either 2 rows of 12 or 4 rows of 6 like item1 - item2 - item3 .... - item12 item13 - item14 - item15 ..,. item24 or item1 - item2 ... item6 item7 - item8 ... item12 item13 - item14 ...item18 item19 - item 20 ... item24
Posted: April 14, 2009 12:02PM
View 1 Replies!
View Related
Splitting Table Entries
I want to split up my table entries into page 1, page 2, page 3, etc... It's just like this forum, where the threads are split up into multiple pages. The problem is, I'm not always going to be sorting by time submitted, which is easy to code. Maybe I want to sort by number of responses. Below is what I put in my PHP file. I don't know how to define $start. $pageNumber = $_POST['pageNumber']; $start = "???"; $sql = "select * from myTable where responses>=$start order by responses limit 20";
Posted: June 15, 2006 04:18PM
View 7 Replies!
View Related
Splitting Database Per Client?
I am working on a database that is relatively small. It has a total of 67 tables, with a little over a million records. It is about 254 MB. The application that works with it has been running for about 5 years and the amount of usage has doubled each year. This year we are projected to triple which will just almost double the database in size one season. My questions is, Is it a bad to split the database up into multiple database. Say we have 300 clients, it would then make 300 individual databases containing the 67 tables but only data pertaining to that client. There isn't much of a reason for the data to be together besides for internal statistics which can be performed on a different server. We shouldn't become larger than 10,000 clients in its lifetime. The problems I see which this setup is when we need to make changes to the "master database" schema it would need to replicate the change throughout all of the "slave databases" Also replication would be a challenge when a new client is added. The application on the code level is pretty much set up for this type of setup.
Posted: Aug 18 10 at 14:23
View 5 Replies!
View Related
Splitting And Looping In The Same Query?
I'm trying to set up a query that can display all items in a concatenated field and struggling. The following manual query works fine: select tt_products.title FROM fe_users INNER JOIN tt_products ON tt_products.uid IN (222,445) WHERE fe_users.uid = 73968 And displays the results ITEM1, ITEM2 from the products table that have the uid of 222 and 445. I need to make this query dynamic. When I do the following query it only displays the first item, even though the tt_products_memoitems contains the values 222 and 445: select tt_products_memoitems, tt_products.title FROM fe_users INNER JOIN tt_products ON tt_products.uid IN (tt_products_memoitems) WHERE fe_users.uid = 73968
Posted: June 9th, 2010, 09:55 AM
View 3 Replies!
View Related
Splitting And Running A Code In PHP
I am currently working on a project where people write articles, which are stored in a database. The credit for the article is stored as [USER ID]:Role and then loaded into the page by loading the user information from another table using the USER ID then implementing the role into the credit. For example: 1:Writing would produce Brad - Writing But as there are multiple credits per page they will be stored in the same column separated by a comma. For example: 1:Writing,4:Images,8:Music which would then appear as Brad - Writing Ben - Images Jay - Music To do this I am exploding the contents of the column with the separator , and then running a foreach(); on the array. In this foreach(); I need to look up the ID's of the users then load the information from the table and then include the Role as well in the credit. I can't think of the best way to do this. Would I need to run a preg_replace to run a separate function to get the information or would there be another way to do it? Or would there even be a better way to store the information in the database?
Posted: Jan 6 at 16:37
View 2 Replies!
View Related
Splitting Content Up Into Multiple Databases
I have to build a system that enables users to build their own one page site with a cms. After examining what I need I figured that I need a set of tables for each user site e.g. page config, colours, layout. Since there will be many users with one or more pages if this website becomes successful I skew form the idea of putting the table sets all in one database. I think putting them all in a separate database will be a better idea but I’m not sure about this, I have never worked with more then one database.
Posted: January 22nd, 2007, 07:27 AM
View 4 Replies!
View Related
Php - Splitting 20 Million Record Database?
I have a US company database which is 20 millions records. Firstly they is no budget for a massive RAM database server. So I think I am going to have to split the db into parts, 4 parts grouped by State. My question is how is the best way to handle this with PHP, I am thinking get the users query find the State and then point to the relevant db?
Posted: Nov 6 09 at 12:03
View 3 Replies!
View Related
Php - Splitting Data Into Multiple Tables?
I am building a employees page. Some of the information goes into an 'employees' table but some of it goes into a 'availability' table that is referenced to the 'employee' table: availability: id / employeeid (unique id from employees table) / monday available / and on and on / So I don't have that unique ID from the employees table until I create them. Is it fine to do a query where I set the employee info and then a query to get the last created row in the employee table and then use the unique id from that to set the availability... Or is that messy and should I have a create employee page and THEN a set availability page? So basically I want to know if it is cleaner and 'better' coding to separate the two functions?
Posted: Aug 26 09 at 15:41
View 5 Replies!
View Related
MySQL Partitioning / Sharding / Splitting?
We have an InnoDB database that is about 70 GB and we expect it to grow to several hundred GB in the next 2 to 3 years. About 60 % of the data belong to a single table. Currently the database is working quite well as we have a server with 64 GB of RAM, so almost the whole database fits into memory, but we're concerned about the future when the amount of data will be considerably larger. Right now we're considering some way of splitting up the tables (especially the one that accounts for the biggest part of the data) and I'm now wondering, what would be the best way to do it.
Posted: Sep 5 08 at 13:59
View 8 Replies!
View Related
Splitting The Column Value Into Multiple Columns?
I have a table that has values in the format given below: ID Class Section Subject RollNo Name Exam Compr Appl Reg Eff Part UnitTest 30538 I I A English 1 Aadya Narain Final 3 4 5 2 3 34 30978 I I A Hindi 1 Aadya Narain Final 4 3 2 5 3 50 30923 I I A Maths 1 Aadya Narain Final 2 3 4 2 1 45 30539 I I A English 2 Aastha MakheejaFinal 3 4 5 2 3 34 30979 I I A Hindi 2 Aastha MakheejaFinal 4 3 2 5 3 50 30924 I I A Maths 2 Aastha MakheejaFinal 3 4 5 2 3 34 30537 I I A English 3 Abhishika Cha Final 3 4 5 2 3 34 30977 I I A Hindi 3 Abhishika Cha Final 4 3 2 5 3 50 30922 I I A Maths 3 Abhishika Cha Final 3 4 5 2 3 34 But I have to display the data in the following format, i.e. each subject to be displayed in a separate column with its compr, appl, Reg, Eff, Part and UnitTest as given below: ...
Posted: March 07, 2010 09:35PM
View 12 Replies!
View Related
Database Splitting Over Network Drives?
ok then i currently have 2 systems for my mysql server, one as a master and one as a slave. if the master goes down then the slave instantly takes its place on the network however storing the database between the 2 without telling all commands to run on both servers would be a pain therefore i though of the idea of having a shared network drive that connects to both systems and then have the systems connect to the drive which is raided to enable a backup. however as the database gets larger we will be a rapid increase in the amount of storage therefore like the thread title says. i would like to split the mysql database content over multiple network drives. the network drives are fibre optic that i have been shown therefore disk performance will not slow down so the main part of the question is;is this atall possible? i know i could of course have the database tables split across the drives but how would you adjust mysql to connect to the set locations, get the file and then merge them all together to show as one database? in short i want to split the actual content over multiple drives while leaving the database as a whole if you get what i mean? if not i will try and explain this in abit more detail
Posted: November 3rd, 2009, 06:16 PM
View 12 Replies!
View Related
Database By Splitting One Big Table Into Many Small Ones?
Assume that I have one big table with three columns: "user_name", "user_property", "value_of_property". Lat's also assume that I have a lot of user (let say 100 000) and a lot of properties (let say 10 000). Then the table is going to be huge (1 billion rows). When I extract information from the table I always need information about a particular user. So, I use, for example where user_name='Albert Gates'. So, every time the mysql server needs to analyze 1 billion lines to find those of them which contain "Albert Gates" as user_name. Would it not be wise to split the big table into many small ones corresponding to fixed users?
Posted: Nov 7 10 at 11:13
View 4 Replies!
View Related
Splitting Reads And Writes In Elgg?
I was looking into the configuration options of the Elgg, the open source social networking site. There was an option which allowed splitting the database connectivity into read and write and even multiple connections for reads and writes. I am not sure as why the splitting of read and write is needed.
Posted: Aug 16 10 at 20:10
View 2 Replies!
View Related
NHibernate: Read/write Splitting?
I would like to connect NHibernate to a MySQL master-slave replication configuration, so I would like to send writes to the master, and reads to the master and slaves. Is this possible? I am also planning on having a load balancer to balance the reads.
Posted: Jun 29 10 at 1:13
View 1 Replies!
View Related
Splitting A Path Enumeration Model PathString In DB?
I'm trying to implement a Path Enumeration model as per Joe Celko's book (page 38). The relevant attributes of my table (and the support table that just contains sequential integers) look like this: Contribution ------------ ContributionID PathString _IntegerSeries -------------- IntegerID _IntegerSeries contains integers 1 to n where n is bigger than I'll ever need. Contribution contains three records: 1 1 2 12 3 123 ... and I use a modified version of Joe's query: SELECT SUBSTRING( c1.PathString FROM (s1.IntegerID * CHAR_LENGTH(c1.ContributionID)) FOR CHAR_LENGTH(c1.ContributionID)) AS ContID FROM Contribution c1, _IntegerSeries s1 WHERE c1.ContributionID = 3 AND s1.IntegerID <= CHAR_LENGTH(c1.PathString)/CHAR_LENGTH(c1.ContributionID); ... to successfully return a result set containing all of ContributionID 3's superiors in the hierarchy. Now, in this example, the PathString column holds plain integer values and obviously we run into trouble once we hit ContributionID 10. So we modify the PathString column to include separators: 1 1. 2 1.2. 3 1.2.3. Now... the book doesn't give an example of getting superiors when the PathString uses delimiters... so I'll have to figure that out later. But it does give an example for how to split up a PathString . The MySQL version of the example code to do this is: SELECT SUBSTRING( '.' || c1.PathString || '.' FROM s1.IntegerID + 1 FOR LOCATE('.', '.' || c1.PathString || '.', s1.IntegerID + 1) - s1.IntegerID - 1) AS Node FROM _IntegerSeries s1, Contribution c1 WHERE SUBSTRING('.' || c1.PathString || '.' FROM s1.IntegerID FOR 1) = '.' AND IntegerID < CHAR_LENGTH('.' || c1.PathString || '.'); ... but this code returns an empty result set. I'm doing something wrong, but I'm not sure what. Figured I'd put this out to the stackoverflow community prior to bothering Joe with an email. [code]...
Posted: Dec 30 10 at 21:53
View 1 Replies!
View Related
|