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

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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.
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733 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], ...
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68 views

PostgreSQL Partitioned table update trigger

I have a date-partitioned table (inheritance partitioninng just like the one pg_partman does) which is referenced by quite a few tables in my database. To resolve the FKs checking for referenced field ...
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21 views

Two Dimensional Partition

We have a new application that we anticipate will grow substantially and we're exploring partitioning now. If we have a database that includes information, for example, across continents, and we want ...
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17 views

Adding Partitions to cube In SSAS via VS 2013

I am trying to add a new partition to my cube via SSDT 2013. I am using the Wizard and doing all stages that needed. After I click "Finish" nothing happens and I cannot see that a new partition has ...
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37 views

MySQL partition on 2 tables one with millions of rows the other with 100's of millions

I have two mostly de-normalized tables in Amazon Aurora (MySQL). The first table had mostly dimensions that are used for selecting the proper data. Examples might be station, program name, operator, ...
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58 views

Copying Partitioned table data to another table on different SQL Server

We have a partition table on Production environment with 2338117620 rows and 206 partitions. Now we have to copy only last 2 year data in Test environment. But the problem is that , Import Export ...
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42 views

Can a BRIN index be used instead of Table Partitioning in Postgres?

Given an append only table with a GUID and a timestamp (and a bunch of other columns) which can grow by ~50Mio entries / year. I want to keep the number of indices low and just use a normal (B-Tree) ...
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40 views

How can I partition records vertically across machines?

I recently asked two questions: (1) how to store and connect partial records in two or more machines, with the record halves correctly associated, and (2) how to determine the increase in time/space ...
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47 views

indexes and partition switching - how it works

We use partition switches to quickly load data, switching entire tables. We load an empty Table A with INSERTs and then switch it with empty Table B. These tables have identical indexes. What I don'...
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96 views

DBMS_REDEFINITION with WHERE clause

I wanted to know if DBMA_REDEFINITON package allows a WHERE clause to filter contents before migration. I have a partitioned table and wants to copy data and constraint to another table using ...
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35 views

Table clustered-index and partitioning in innoDB

I have a table with 45 columns, 3 of which are relevant: table Transactions(tr_id : int primary key, client : int, tr_date : datetime); The inserts to the table are done client-by-client The ...
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25 views

In Postgres, is it possible for me to have a table partitioning constraint based on data type?

Say I have the following schema for my Postgres database: CREATE TABLE sources ( source TEXT NOT NULL, PRIMARY KEY (source) ); CREATE TABLE ipaddrs ( addr INET ) INHERITS (source): CREATE ...
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70 views

PostgreSQL doesn't use index on inherited tables

I have two tables in PostgreSQL 9.4.5 deployed on Amazon RDS: an append only, weekly partitioned, All Positions table. These store all position readings from about 100,000 sensors. There are about ...
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44 views

Restoring SQL Server 2012 Enterprise to Web Edition not possible due to full text partitioning

I have an SQL Server 2012 Enterprise database I’m trying to restore to SQL Server 2012 Web Edition instance. I’ve used sys.dm_db_persisted_sku_features to find features to remove before a backup/...
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53 views

Mysql hash partition

In my system's database we have a table which stores 3 fields: id int, name(varchar) and description (mediumtext). The table is by far the biggest in our database and the queries on it are exclusively ...
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40 views

Can I Implement a Sliding Window for a Table Spread Across Two Partition Schemes on the Same Partition Function?

I have a table with a PK based on a bigint identity and will have a clustered index on a datetime2 column. I've created a partition function based on calendar quarter and was planning on two partition ...
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68 views

Explain partitions

What does the possible keys, reference and rows indicate in explain partitions? I have used partitions on the table and I executing the explain partitions with a query: select count(...
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Delete datafile from parttioned table

I'm used SQL Server 2014. My big table partitioned by date column and each partition has own datafile. I want delete oldest partition data and data file too. How to do it?
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MySQL partitioning table by date and hour

I have a table with a timestamp field. This table will have millions of rows every day so the idea is to create partitions by date and hour. Every day I will delete partitions older than 10 days and ...
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109 views

Maintain Up-To-Date Copy of Very Large Table if Clustering/Partitioning/Moving Operation Needs to be Killed/Rollback

I've appended the following information in a previous post but I asked the 'why' instead of the 'how'. So here's the question... SQL Server 2014, CU6. 4.5 TB database, Simple recovery. The most ...
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600 views

Postgresql: Partition table by hour

I have a system that inserts several million records over the course of 24 hours. Users don't care about the data that's older than 24 hours, and typically query data over a small time frame (5 to 60 ...
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51 views

Using the partition function in the Where clause

I've been asked to test out performance of a database (a test system) after implementing horizontal partitioning. The database is on SQL Server 2008 r2. I'm inheriting this from someone else and ...
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87 views

Does partitioning help if you don't query on the partition value?

Say I have an orders.Order table that is partitioned on CreatedWhen (a datetime column set to GetDate() when the row is created). The table has over 10 million rows and the partition is quarterly (...
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58 views

Best ratio for files and file groups for a highly partitioned table

I have a number of tables with exactly 1000 partitions. Each table can be up to 200G with 100M rows and cannot be compressed. Data in partitions distributed quite equally. The SQL Server has 8 cores....
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81 views

SQL Server Database Table Partitioning Consideration

I have a SQL Server table with 42 million + records. This table acts as a staging area for transaction records loaded from a different system. Data from this staging table have to be transformed and ...
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112 views

MySQL table partition strange behavior (slow query suddenly)

(I asked this question in "stack overflow" and was recommended to ask in here). (MySQL version: 5.6.15) I have a huge table (Table_A) with 10M rows, in entity-attribute-value model. It has a ...
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54 views

SQL Server partitioning of many-to-many tables - triggers

Many to many tables usually have only foreign keys to related tables, like EmployeeId PositionId Is it good idea to add column only for partitioning and set its value with INSTEAD OF INSERT/UPDATE ...
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170 views

Is it best practice to include partition keys within foreign keys when referencing partitioned tables?

The large tables in our database are partitioned by an id in order to separate data and speed up IO. The table of the data is partitioned by the partition key, but the primary key is only on an ...
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306 views

Paritioning performance for full table scan on non-paritioned index

We have a table in Postgres that we are considering partitioning. We occasionally query an indexed field that is separate from one with the partition key. My question is: Can partitioning the table ...
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350 views

SQL Server : ALTER TABLE tablename SWITCH PARTITION 2 to tempempty

Have a sliding partition where I need to remove the trailing partition when they expire. I create an empty table that matches the existing table. When I create the empty table, I specify the file ...
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38 views

Are there any inherently non-partitionable datasets?

Are there any practical datasets that, by their nature, cannot be partitioned in any practical way? I am wondering about this because such datasets would be ill-suited to scaling out on commodity ...
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96 views

Mysql, sql server, oracle tables get too large [closed]

I hear a lot about things that, it is a lot cheaper to buy new harddisk than pay staff to come up with genius ideas how to save resources. But what I don't understand, is how these databases handle a ...
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922 views

Incorrect information in .frm file after a power outage?

CentOS release 6.3 (Final) x86_64 mysql Ver 14.14 Distrib 5.5.31, for Linux (x86_64) using readline 5.1 SHOW SLAVE STATUS\G: Slave_IO_Running: Yes Slave_SQL_Running: No ...
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How do I configure MySQL to store specific entire InnoDB tables on a different drive in Windows ( Server )?

After skimming the MySQL ( 5.5 ) docs on Partitioning, that seems to deal with breaking parts of the same table off onto other drives. I'm struggling to find information on how I pinpoint an ...
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20 views

How to take partitions or filegroups out of service [migration] [duplicate]

I'm an experienced SQL Server DBA but new to partitioning, and a had a couple of questions. Using SQL Server 2008 R2 Enterprise Edition. I've inherited a large customer metrics database that grows by ...
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186 views

Is there an advantage to moving to 'real' date partitions on MySQL 5.5?

We are using partitions per day for some our tables. We started with MySQL 5.1, so we had to partition using the to_days (end_time is a datetime column): ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=...
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387 views

When to split a large table

I run the SQL Anywhere DBMS, and we have a table of about 10 columns(normal text, timestamps etc). However, in my use-case, every single day, the table gets 2160000 new rows. It's also crucial that ...
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123 views

MySQL Partitions

I've done a lot of work with MySQL but generally on a much smaller scale than this, so please excuse my ignorance. We've got an InnoDB table which is currently storing ~3.5 million rows, which I know ...
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308 views

How to make Greenplum 4.2.3 only scan the intended partition?

When I uses unnest() in a View, and uses that View in a select statement, Greenplum seems to fail in only searching for the intended partition and search through all the partition of the main table ...
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254 views

MySQL Partitioning, Reorganize Max Value partition (Known Bug / Feature)

I have written a crone job which reorganizes last max value partition every week into 2 new partitions , one for the previous week , and one for the future data (new max value partition which ...
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67 views

Partition guides and possible solutions?

We have a table called tblLink which is the main table and have its primary key in many other tables as shown below. The issue now we want to keep only the latest 3 months data and the rest should be ...
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106 views

Basic PARTITION question in MySQL

Say I have an application using MySQL and at some point decide that implementing Partitions on certain tables might improve performance. Would I need to change the applications select statements ...
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How to keep archive table accessible for some users which is not frequently accessible?

I have partitioned my table based on some boundary ranges. My Database is built at MSSQL server 2008 R2. I have done partitioning for a table which has 40 million records in it. Now it's time to ...
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schema for mysql database with 30million rows

We am building a SaaS backend for restaurants. We integrate directly with POS, so each POS keeps sending customer orders that we store in a following table in mysql. CREATE TABLE name ( `id` int(11)...
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2k views

Difference between partitioning and fragmentation [closed]

I'm trying to learn something about distributed databases and I stumbled upon the concepts of fragmentation and partitioning. It seems to me as if both do the same thing and produce similar results (...
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755 views

Strange behaviour with MySQL 5.1 TO_DAYS partitioning schema

I have this table definition: CREATE TABLE `va_ventas` ( `ID` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT, `Date` DATE NOT NULL, `Time` TIME NULL DEFAULT NULL, `Country` VARCHAR(3) NULL DEFAULT NULL, `...
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MySql - partition by range and unique key

i'm trying to create the following table: CREATE TABLE `s_relations_with_partition` ( `id` int(11) NOT NULL AUTO_INCREMENT, `source_persona_id` int(11) NOT NULL, `relation_type` int(11) NOT ...
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Understanding Disk Partition Alignment for Windows Server 2012 and SQL Server 2014

I am about to setup a SQL Server 2014 on a Windows Server 2012. Starting from best performance on the drive I formatted the drive with 64k allocation unit size. Now I am stuck using Diskpart to set ...
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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 ...