Splitting a database table into multiple segments for performance or manageability.

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SQL Server does not optimize parallel merge join on two equivalently partitioned tables

Apologies in advance for the very detailed question. I have included queries to generate a full data set for reproducing the problem, and I am running SQL Server 2012 on a 32-core machine. However, ...
0
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1answer
2k views

Unable to select the records from specific partition in mysql?

I've created a table using the following query, CREATE TABLE employees ( id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, fname VARCHAR(25) NOT NULL, lname VARCHAR(25) NOT NULL, store_id ...
5
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2answers
632 views

Large accounting table, best way to partitioning by two dates

I need to create a log table to stores the connections to out network (last 3 years, after that the log will go into backup). The hardware/software used is proprietary, and for accounting it just call ...
4
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1answer
145 views

SQL Server data partitioning

This is for SQL Server: I have a table that has been partitioned. Sometimes, I need to completely update an existing partition - the updates could be extensive enough to touch all rows of the ...
5
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2answers
607 views

Partition Function vs. Clustered Index

We have a table that is clustered on identity/datetime2. It is partitioned on the same datetime2. Are there any reasons to cluster on datetime2/identity instead? I understand the reasoning behind ...
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1answer
3k views

PostgreSQL 9.1 - Query on VIEWS taking a lot of time

Using PostgreSQL 9.1, we are having problems while executing queries on a VIEW of PostgreSQL. Following is the situation: We have a partitioned Table "buz_scdr" over which we have built a VIEW ...
3
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2answers
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Troubleshooting Oracle ORA-08103 - object no longer exists

I am getting this error from Oracle intermittently. A trigger is truncating a partition from a partitioned table while a long-running query is running against it. Since I'm truncating a different ...
3
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1answer
427 views

Oracle: Interval partitioning and dependant tables

I'm not a DBA, but I've been asked to look at a database which is expected to handle up to 80M records in one of it's tables. This table also has two tables linking to it via foreign keys with up to ...
1
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1answer
1k views

MySQL, “columns partitioning” when multiple columns are individiually important

MySQL 5.5 introduces "columns partitioning". http://dev.mysql.com/doc/refman/5.5/en/partitioning-columns.html I'm trying to better understand how it works when two columns are important individually. ...
1
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1answer
94 views

Where does it make sense to store Indexes for partitioned tables?

Prior to table partitioning, all the indexes were stored on a separate drive, per this question. Now that I partitioned a couple of tables, SSMS is offering to store indexes in the partition scheme. ...
3
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1answer
622 views

Why am I getting Table scan on a partitioned table query?

I have table Inventory_Break partitioned on IR_ID (int). I also created a non-clustered index for IR_ID on the table. When I run the following: SELECT * FROM dbo.INVENTORY_BREAK WHERE IR_ID ...
14
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3answers
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Does the partition key also have to be part of the primary key?

I am partitioning a table based on a column that is not a primary key? I've read some conflicting information today on whether the partition column must be a part of the primary key. My gut says no, ...
5
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2answers
151 views

Mechanics of partitioning

Imagine the following hypothetical database structure. Basically it's a top down structure (Country has Orders, Order has OrderLines, OrderLine has ShipLines, etc...). I want to partition my SQL ...
0
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1answer
220 views

strange situation with very large partitioning table

I have a very strange situation here... On my SQL Box there is a large Table this table is partitioned, everything was fine until I forget to make new partition ranges. in the first picture the last ...
2
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2answers
317 views

MySQL Partitioning

I have a MyISAM table that holds a few million Messages. I am thinking about converting it to an partition InnoDB table. Just wondering about the best partition strategy. I would like to do this ...
10
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1answer
419 views

Disk file effects of delete and vacuum

I have a very frequently updated table with 240 million rows (and growing). Every three hours 1.5 million rows are inserted and 1.5 million are deleted. When I moved the cluster to a SSD this bulk ...
1
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1answer
399 views

What is the “Data partitioned, Shared-Nothing, Parallel Database” solution for PostgreSQL ? [closed]

I was looking for a open source parallel database solution. It seems Postgres-XC is a viable solution. However, I don't need the replication. In this case, is there any better solution towards read ...
0
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1answer
6k views

open files limit

I am getting "too many open files" error when I try to insert records in a partitioned table. mysql> insert into test.ox_data_geo_span select * from vserv.ox_data_geo_span limit 100; ERROR 1016 ...
1
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1answer
636 views

How many files should I create for one filegroup and 9 weekly partitions?

I have 9 weekly partitions on one filegroup. How many files do I need to create? There are 3 tables containing 46 million, 16 million and 10 million rows.
4
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1answer
462 views

SQL Server Partitioning - Parent / Child tables

I'm currently investigating implementing partitioning for a fairly hefty (800GB and growing) SQL Server database. All of the data in the tables is relatable to a date/time, however this date/time is ...
2
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2answers
1k views

Best practices for creating partition schemes and functions

I'm implementing partitioning for the first time in SQL Server 2008 R2. I've several large tables that I am partitioning. My main question is: Should I use the same Partition Scheme and Function for ...
3
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2answers
700 views

T-SQL: How to switch all partitions from one table to another?

Is it possible in a single statement to switch ALL partitions from one partitioned table to a staging table?
3
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1answer
231 views

Optimizing queries against a set of tables that contain partitioned data

I have a third party program that creates and populates a series of tables to hold some historical data: data_33 -- contains data for 12/01/11 - 12/05/11 data_34 -- contains data for 12/05/11 - ...
4
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1answer
139 views

Rank Partition?

I have a table which holds customer information with an Account state (working or Deactivated) for every single day. I'm trying to reduce this information by showing start and end dates for the ...
3
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3answers
667 views

Is it possible to virtually vertical partition and oracle database table?

Just like the question asks; is it possible to transparently partition a table vertically, by using virtual partitions? I'd imagine if it was possible, that columns would just be stored in separate ...
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2answers
579 views

Create multiple files for each file group for table partitioning?

I am partitioning a table by date (month). The server has four drives. The partition scheme is defined as CREATE PARTITION SCHEME ByDate AS PARTITION ByDate TO ( [PRIMARY], [fg2], [fg3], [fg4], ...
0
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2answers
251 views

shall I use multiple separete tables or one table with multiple partition on oracle

I have an entity lets call it Response, and another entity called ResponseType, Response entity contains the ResponseType; so when I am building the physical model I confused with how to implement it; ...
3
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2answers
456 views

do partitions make sense when dates are not involved?

We are having some discussions about partitioning some application tables in SQL Server 2008 based on their quickly growing size. One is an event table that is typically used for INSERTS (80% of the ...
2
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1answer
178 views

Can not add list partitions

Following is the create table statement that is working as expected. But if I have a table without any partitions and if I try add partitions, it seems that I can not add more than 16 values in it. ...
1
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1answer
779 views

Triggers not being run on a partitioned table

I'm using PostgreSQL. I have a table that I have partitioned into three sub-tables - and as far as I can tell, this all works correctly. Rows are correctly inserted into the appropriate partition and ...
4
votes
2answers
508 views

Huge database logging of event type rows and ways to optimize it

We have a database that stores events. Events are generated at a 1000 per sec rate. We need to keep these events accessible for some years. Usual use of these events is selecting some of them from the ...
7
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1answer
653 views

Full-text index in partitioned table

I have a table with just over a million records with a full-text index. This table has been split in two in the past, and the data older than a certain date is moved to another table with the exact ...
3
votes
2answers
3k views

mysqldump vs LOAD DATA INFILE

Why would you ever use mysqldump to repopulate a table over load data infile? Here's the back story to my question. We had a table that was incorrectly partitioned. It was supposed to be ...
2
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2answers
3k views

Why the query scan all the partitions?

I have the following partitioned table create table T (Month char(6), ID int, .... primary key (ID, Month)) on psMonth(Month) The partition function is CREATE PARTITION FUNCTION [pfMonth](char(6)) ...
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2answers
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SQL Server 2008 - Partitioning and Clustered Indexes

So let me preface by saying I do not have total control over my db design, so a lot of the aspects of the current system cannot be changed for the purposes of this scenario. Comments about how we ...
0
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1answer
379 views

MySql - Global index

I'm new to MySql partitioning and have a question regarding indexes. let say i have the following table: CREATE TABLE `members` ( `id` int(11) NOT NULL AUTO_INCREMENT, `user_id` int(11) NOT NULL, ...
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3answers
1k views

SQL Server 2008 Partitioning Evaluation

I'm trying to do a performance comparison of a table with partitioning and the same table without partitioning. So we have Subcriber and SubscriberPartitioned tables. Tables structure is: ...
0
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2answers
203 views

Inputs on handling large volumes of data for specific tables in SQL Server standard

I have large OLTP ERP database with 10 million records in few tables. The database size is as large as 10GB. I have few critical transaction tables like this: 1. Payments 2. Cheques etc., and each of ...
4
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2answers
2k views

Separate tables or partition one huge table?

I'm building a rather large table that includes a particular column, my_column. There are a small-ish number of possible values for my_column, and each unique value of my_column should have the same ...
1
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4answers
862 views

Top 2 rows per partition from an absolute value date difference

I have a database of security camera footage in a denormalized database. I have Locations which have multiple Cameras which take multiple images. Location + Camera + image capture_date is the ...
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1answer
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oracle global index vs local index on a partitioned table

I have a table that has range partition by month on a date column (created_time). I was wondering what is more efficient of creating a global index on this column or creating a local index on this ...
4
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1answer
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Partitioning a table with LOB columns in Oracle 11g

we have a fairly small table (~25k rows) that is being heavily written to and most of the rows go away quickly (it's part of a scheduling application which stores information about the jobs in that ...
6
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1answer
555 views

PostgreSQL partition hierarchy design for centralized logging

I am looking into setting up logging from all of my servers into a centralized postgresql database. It makes sense to be able to drop logs by date or by host, so I'd like to set it up with ...
0
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1answer
197 views

Multiple Partition Keys?

This is a follow-on from a previous question. I've never worked with SQL Server partitioning but I currently faced with designing a database for which the volumes probably warrant it. The system is ...
7
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4answers
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SQL Server Partitioning - what to use for partition key?

I've never worked with SQL Server partitioning but I currently faced with designing a database for which the volumes probably warrant it. The system is for coupons. The coupons are to be issued ...
4
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1answer
981 views

How to best store the Google Web Ngram data?

This is a continuation of How to best store Google ngrams in a database?, which covers how to store the Google Ngram Book data. I'm looking to store the Google NGram Web data, which is slightly ...
6
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3answers
960 views

non-clustered unique indexes on sql server partitions

SQL Server 2008 requires unique non-clustered indexes created on a partition to include the partition field in the index definition. I'm wondering why.
15
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4answers
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SQL large table design

I have a general question about SQL Server 2008 table(s) design. We currently have a table that is over 600GB and grows at about 3GB a day. This table has the appropriate indecies but is becoming a ...
0
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1answer
2k views

Reindexing Partitioned Table Indexes

Historic Reporting Server running SQL 2008 R2. I'm trying to tweak the fill factor. I have a job that records the fragmentation when the jobs runs in the early hours. For every table that had high ...
3
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2answers
141 views

Is it possible in SQL Server 2008 to have Structures in one file and Rows Data in another file?

I know this may sound ridiculous but: Is it possible to separate the Data Definition (i.e. Structures of my Tables, Views and other things) and Rows-Data on a File-Level in SQL Server. I think it will ...