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

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SQL Server Partitioning - parent/child tables reference partitioning

I have a requirement to partition quick growing tables in our product and below are the table information with key details. PERIODIC_EVENTS (PARENT TABLE which has ID (sequence no) as Primary KEY and ...
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82 views

MySQL Create Table with Partition Slow on server machine

Following create table statement with Partition runs in 10 Second on My Development Machine windows 7, i5 , 8GBRam, single disk runs in 16 Second on Virtual Machine windows server 2012 , xeon 2GHz ...
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1answer
43 views

Mysql Partitions with Partition limit

I have a partition table on basis of Primary key having 1.5 Billion rows in it. But when i check ibd files only 80 ibd show in GB's whereas 120ibd shows 1MB file. I would like to know how does the ...
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1answer
96 views

What's the best way to structure logging application data in MySQL

I may be overthinking this but: I have an API; I want to log calls to the API for stat/debugging purposes. Ideally the speed of reads should be quick but is not essential (as will primarily be read ...
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1answer
75 views

Best practices for selecting partition boundary ranges to maintain empty partitions at both end?

I have partitioned the table based on a date datatype partitioning column. The data for the column starts at "2014-01-01" and ends at "2015-01-01". I know that, the partitions should have empty ...
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28 views

How to determine is a value exists in a column within a partition

I have a set of data where I need to look at partitioned data and determine if a value exists within that partition. Example data: AccountNumber Code Status Credited ...
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30 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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1answer
97 views

(How) does table inheritance interfere with locking in postgres?

I have a table inheritance setup that might be simplified like this: CREATE TABLE p ( id BIGSERIAL PRIMARY KEY, type_id BIGINT, approved BOOLEAN ); CREATE INDEX ON p(approved); CREATE ...
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3answers
503 views

Is database partitioning for performance reasons meaningful in a virtualized environment?

When running SQL server on physical hardware, placing database data and log files on separate disks or RAID arrays can benefit performance, resilience, and maintenance. Partitioning the database over ...
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49 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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1answer
69 views

How to migrate data of to another sql server

Good day, I have a database running on a virtual machine hosted at our ISP. It is a fairly large database which has about 5GB of data inserted into it every day (network logs). It is partitioned ...
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57 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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163 views

table partition in order to solve frequent deadlock issues - how would I know if it will work?

I use sql server 2005 enterprise edition and have a subscriber DB - part of a transactional replication - that is used for Business Intelligence purposes - they run reports out of it, and SSIS ...
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2answers
479 views

How to do Partition for MySQL 100GB table in zero downtime?

I have a Innodb engine table with 100GB,I have a planned to do partition the table.Can anyone tell me how to do it in zero downtime? In 100GB table the records are increasing for each and every ...
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1answer
125 views

Optimise huge Postgres table for fast read

I'm about to create a Postgres table with 1.5 billion rows. The table will just have a single TEXT column. The table is effectively a blacklist. When a user of my software saves certain data, this ...
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27 views

Creating separate small table from big based on access frequency for “select” performance

I have table with several millions of rows which are selected a lot (many times in a second in average). It is indexed and everything is ok for now. But performance is always a question (sometimes ...
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2answers
381 views

Should I group by and then join, or join and then group by?

(oracle's optimizer does the same thing for both approaches when just two tables are involved, thus my question involves three tables) Assume three tables t1, t2 and t3 with a pairwise 1:n ...
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2answers
105 views

Connection problems with ManagePartition executable

I'm currently running SQL Server 2014 and we have some tables that have been partitioned and I'm trying to use the ManagePartition application here (http://sqlpartitionmgmt.codeplex.com/) I've typed ...
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1answer
2k views

Sharding Postgres Database

I have a Postgres database that has grown to the size where it is no longer feasible to store everything on a single database node. There is a Customer table in my schema where each row represents a ...
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1answer
115 views

How do I create a partition using a bit field in SQL Server 2014

I have a table where data is archived. I need to keep this data as it is rarely viewed. Instead of moving archived data to a separate table, I wanted to create a partition on the Archived field. When ...
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3k views

Partition by year and sub-partition by month mysql

I have a database with a date column having datatype as date. I am using mysql 5.6 The table is expected to have 10k rows each day. I want to create partition on the table on year range and then sub ...
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2answers
116 views

SQL Server 2012 Table Partitioning - Have I done it correctly?

I have a table that stores accounting transactions for what we call "jobs". The table looks like this: ( REGION char(3) JobNumber char(17) SeqNum decimal(5,0) ..... ..... ..... AcctYear decimal(4,0) ...
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3k views

What is the modern way to partition PostgreSQL across machines, when the data is “naturally partitionable”

After several years of dwelling into the "NoSQL" space, now I have a problem that is quite "relational" in its nature. Today I see data stores with quite different eyes than before. Things like Riak ...
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2answers
414 views

Will enabling row movements on list-partitioned table cause performance problems(oracle 11g r2)

Our incident management system has run for years, and the large quantity of closed incident tickets makes the table rather huge and slows down the search queries. Our database version is oracle 11g ...
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1answer
262 views

Adding new key(s) to enable partitioning, INSERT performance?

I have a table to storage GPS coordinates with multiple (~30) inserts per second (from 50 different devices) during 12 hours per day, so the table is growing fast, to improve the SELECT speed I was ...
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1answer
97 views

Is there any way to use “like” operator during oracle table partitioning

I am using Oracle 11g database and I have 45 million records. I want to partition the table, but if it's possible for partitioning to support the like operator then it will be much helpful for me. In ...
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73 views

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` ...
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135 views

Active/current (1-5%) and historical records in same table: index or partitioning?

I am trying to discover the correct architecture for the following situation. An application stores 'source data' in multiple tables. Each of these 'source data' tables contains actual, current, ...
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1answer
35 views

How to efficiently swap a portion of a large table's data?

I run an application (price comparison website) where I need to update a pricing table with dozens of millions of rows every day. Basically, every product feed I download from a merchant results in ...
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1answer
193 views

Script Table Definition in Powershell

I'm writing a powershell to create a duplicate table(in another schema) for the purposes of partition switching*. I'm having problems adding the columns and the clustered column store index. Here's ...
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77 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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145 views

How to partition a MySQL table by Week using a timestamp column?

I have the following MySQL 5.6 table, which uses InnoDB and contains a timestamp column (I've omitted all the extra columns, in order to simplify my question): create table partition_by_week ( id ...
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51 views

High CPU Usage for Mysql after adding partitions

On an amazon m3.large instance (vCPU:2, Mem: 7.5), I run a mysql(5.5.29) server. Initially, the state of the server is OK except that the query is too slow. However, after partitioning the table ...
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233 views

The column order of composite clustered primary key on a partitioned table? [closed]

I have the following table. create table T (K1 date, K2 int, ....) on partitionScheme(K1) The table will be partitioned by K1 (K1 has low selective. the data will be appended in the order by K1). ...
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31 views

Is database sharding done on a table level or database level?

I'm new to sharding databases, so I'm trying to wrap my head around it. Let's say we have a database that has 3 tables: Customer, Suppliers and Orders. Each table has 10 million records. I want to ...
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17 views

Support for dynamically creating partitions

I would like to know the following: Is there a RDBMS which offers support for creating partitions for a table dynamically? For e.g.: If I choose to partition a table by day/week etc., I want it to ...
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2answers
163 views

Partition : understanding files and file groups

We are trying to partition a large history table. Being new to partitioning, I was trying to understand the concept of files and file groups. File groups can be set up in following three ways : 1. ...
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112 views

Using partitioned table, and dealing with auto_increment PK

I have a big table (>100 million rows) that tracks user's activities. It has an ID, which is PK and has auto_increment property. This is the only unique key. Table also has userid and datetime column. ...
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1answer
255 views

SQL Server data files in Windows Azure: filegroups and partitioning still applicable?

I just created a database using the new functionality "SQL Server 2014 data files on Windows Azure" and this works quite well. However, I have a table with a billion records and in our local ...
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58 views

Recreate partition in mysql

I have a table having datetime column partitioned by RANGE (DAYOFYEAR(datetime_col)) By this I want to drop oldest of 4th week partition data and recreate immediately for next year similar week ...
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46 views

Oracle estimate cardinality on partitioned table

How does Oracle estimate cardinality on a partitioned table if the query gets the list of partitions from a subquery or a join? For example, if I have a query like this select * from ...
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66 views

Getting rid of partitioning in Postgresql 9

it turns out that our approach with list partitioning was not the best idea. We have way to much small partitions and a lot of time is wasted on partition choosing by query optimizer. What's the ...
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1answer
51 views

Help with optimising a sql query on two partitioned tables

I have a SQL query that I am running on two very large tables in SQL Server 2012 Enterprise The two tables are ACKs and Logs. Both are partitioned on their time by day column with the appropriate ...
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2answers
117 views

Make sure partitioning is working

I created a partition for a table. There is a column "archived" (tinyint). 0 goes to PRIMARY data file, 1 to ARCHIVED data file. ALTER DATABASE MYDB ADD FILEGROUP [ARCHIVED]; ALTER DATABASE MYDB ADD ...
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2answers
167 views

Update on view over partitioned tables updating all indexes

We have a table, which is partitioned through a date field into separate years. There is a view over all of these tables (Call) Schema is as follows: CREATE TABLE [dbo].[Call_2015]( [calID] ...
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46 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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117 views

Performance degradation after partioning tables using DBMS_REDEFINITION package

We have created partitions on per-existing tables in my application using DBMS_REDEFINITION package. just for the sake of improving performance. Now , We are facing an issue in the performance ...
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1answer
107 views

Adding Indexes To a Partitioned table in SQL Server 2012

I have recently converted our one large table to use table partitioning in SQL Server 2012. It's a table that stores logs based on a time. So I created a partition function to split the table on my ...
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237 views

Renaming the system generated partitions during interval partitioning

I am trying to rename the system-generated partition names (generated during interval partitioning). I try to do this while my table is live(data read and write is happening). I need two scripts. I ...
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1answer
345 views

Efficient way to DELETE whole partition's data in table partitioned by HASH(DAY(datetime))?

I have a MySQL InnoDB table PARTITIONed by HASH(DAY(dateTime)). I'd like to remove partitions holding data older than 10 days. CREATE TABLE `partitioned` ( `id` bigint(20) unsigned NOT NULL ...