SQL Server 2012 :: Table Partitioning For 500gb In Size
Feb 25, 2014Script to do the table partitioning for a 500gb in sliding window technique?
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SQL 2012 :: Dynamic Partitioning Of Table Server
Dec 3, 2014I need Dynamic Partition of SQL Table.
1. What is the best practice for partitioning (on date column)
2. The project on which i am working correctly have a case where in i get the update of my status flag after few days (Say 15 - 30) in that case if my data got into partition table how to update and how to search which partition has my data
3. Is creating partition occupies more disk space?
4. Is every partition would need index?
SQL Server 2012 :: Table Partitioning Based On Date Column
Aug 25, 2014We have a database and have 6-7 growing tables. All the tables have Primary and foreign key relation. I want to do partition based on the date column.
I need 3 partitions
First partition has to hold present data
second partition need to hold the previous year data (SAS storage)
Third partition need to hold all the old data and need to be in the archive database
I understand that first we need to disable the constraints (Indexes PK & FK)
Then create partition function and partition schema
Then Create the Constraints again
SQL 2012 :: 500GB Data Warehouse - How To Split It Into File Groups
Aug 21, 2014OK, so I have:
- 500 GB DW
- 5 GB in smaller DBs
- 220 GB TempDB
- 350 GB in Log files.
My machine is Fujitsu Primergy 64 cores (with HT) and 192 GB RAM.
I have several IO locations:
- 540 GB in-server HDD 15k RAID10
- 1 TB HDD 15k RAID10 on SAN (separete controller)
- 2 TB HDD 15k RAID10 on SAN (same controlller as below)
- 800GB SSD RAID10 on SAN (same controller as above)
Data warehouse has 2 fact tables that are absolutely crucial and quite large.
Now i want to organize DB into several Filegroups and put them on different drives. Filegroups I'm thinking of:
- FILEGROUP1: for 1st crucial Fact Table
- FILEGROUP2: for 2nd crucial Fact Table
- FILEGROUP3: for tempDB
- FILEGROUP4: for dimensions data
- FILEGROUP5: for the rest of facts data
- FILEGROUP6: for dimensions indexes
- FILEGROUP7: for the rest of facts indexes
- FILEGROUP8: for 1 log file of one smaller DB (its in full-recovery and its quite large)
- FILEGROUP9: for the rest of log files
- FILEGROUP10: others
How should I organize them across available drives? I was thinking about sth like:
800 GB SSD: FILEGROUPS 1-3
2 TB RAID10: FILEGROUPS 5+7+8
1 TB RAID10: FILEGROUPS 4+6+10
540 GB in-server: FILEGROUP 9
I know that having multiple filegroups on the same drive is pointless regarding performance, but in future i could actually add some more drives, so i want to separate them now.
Also - how much files per filegroups should i create? Considering 1 or 2. Except TempDB where I am going for 4.
SQL 2012 :: Table Partitioning - Switch Out / Merge Range
Mar 6, 2014If the partitioning MERGE command attempts to drop historic data at the wrong boundary point then data movement between file groups may be necessary before or during the next index rebuild. The script below creates 2 test tables, one using a range right function and the other using range left. The partitioning key is a number between 0 - 59, an empty partition is maintained at the start and end of ranges, 4 partitions contain data in the ranges between 0-14, 15-29, 30-44, 45-59. Data in the lowest range (0 - 14) is switched out and a merge command is run, edit the script to try the different merge boundaries, edit the variables at the start to suit runtime environment 'Data Drive' & 'Log Drive' paths.Variables are redeclared but commented out at the start of code blocks to allow stepping through if desired.
--=================================================================================
-- PartitionLabSetup_20140330.sql - TAKES ABOUT 1 MINUTE TO EXECUTE
-- Creates a test database (workspace)
-- Adds file groups and files
-- Creates partition functions and schema's
-- Creates and populates 2 partitioned tables (PartitionedRight & PartitionedLeft)
[Code] ....
The T-SQL code below illustrates one of the problems caused by MERGE at the wrong boundary point. File Group 3 of the Range Right table is empty according to the data space views, it cannot be dropped though. File Group 2 contains data according to the views but you are allowed to drop it's file.
USE workspace;
DROP TABLE dbo.PartitionedRightOut;
USE master;
ALTER DATABASE workspace
REMOVE FILE PartitionedRight_f3 ;
--Msg 5042, Level 16, State 1, Line 2
--The file 'PartitionedRight_f3 ' cannot be removed because it is not empty.
ALTER DATABASE workspace
REMOVE FILE PartitionedRight_f2 ;
-- Works surprisingly although contains data according to system views.
If the wrong boundary point is used then the system 'Data Space' views show where the data should be (FG2), not where it actually still is (FG3). You can't tell if data movement between file groups is pending and the file group files are not protected from deletion by the OS.
I'm not sure this is worth raising a connect item for but it would be useful knowing where data physically resided after a MERGE RANGE and before an INDEX REBUILD, the data space views reflect the logical rather than the physical location if a data movement is pending.
SQL 2012 :: Partitioning Large Table On Nullable Date
May 15, 2014I have a very large table that I need to partition. Ideally the table will write to three filegroups. I have defined the Partition function and scheme as follows.
CREATE PARTITION FUNCTION vm_Visits_PM(datetime)
AS RANGE RIGHT FOR VALUES ('2012-07-01', '2013-06-01')
CREATE PARTITION SCHEME vm_Visits_PS
AS PARTITION vm_Visits_PM TO (vm_Visits_Data_Archive2, vm_Visits_Data_Archive, vm_Visits_Data)
This should create three partitions of the vm_Visits table. I am having a few issues, the first has to do with adding a new clustered index Primary Key to the existing table. The main issue here is that the closed column is nullable (It is a datetime by the way). So running the following makes SQL Server upset:
ALTER TABLE dbo.vm_Visits
ADD CONSTRAINT [PK_vm_Visits] PRIMARY KEY CLUSTERED
(
VisitID ASC,
Closed
)
ON [vm_Visits_PS](Closed)
I need to define a primary key on the VisitId column, but I need to include the Closed column in order to partition on it.how I would move data between partitions on a monthly basis. Would I simply update the Partition function, or have to to some sort of merge, split, or switch function?
SQL Server 2012 :: Getting Size Of Filtered Table?
Jun 18, 2015I would like to get the size of the tables in my database BUT as follows:
SIZE OF (SELECT * FROM myTable WHERE Section = 1)
...what is the fastest way to do it?
Table Partitioning On A RAID 5 Server
Dec 2, 2006Is there any benefit in creating seperate file groups for a partitionedtable on a multi-processor server with RAID5 and 1 Logical Drive?
View 8 Replies View RelatedSQL Server Admin 2014 :: Possible To Find Table Size And In That Table Each Row Size
Jun 10, 2014It is possible to find table size and in that table each row size.
View 4 Replies View RelatedSQL 2012 :: Estimate Size Of A Table
Feb 4, 2015I have a table like below,
CREATE TABLE Student
(
Id BIGINT not null
,Name NCHAR(20) not Null
,Branch NVARCHAR (64) null
)
The table contains : 100000 rows .
Getting details of below
1)Number of rows in a data page
2)Total number of pages required for the table
3)Total Table size in KB or MB
4)Total file size in Kb or MB
SQL Server 2008 :: Automate New Partition Creation In Table Partitioning?
May 8, 2013we planning to create partitioning on existing tables. The partitioning is on date column, there should be one partition for each year.
Creating of new partitions should be automated, and also we dont have any plans of archiving old data, all we want is that new partition creation should be automated.
SQL 2012 :: Incorrect Table Size Being Reported
Aug 15, 2014I have a table that contains 1.6 million rows, and is about 2.6GB in size.One of the columns is ntext and contained some xml.Realistically, I don't need the xml for anything older than about 2 months, however, i'd like to keep some of the data in the other fields.I decided that if I updated the xml to blank, I would see some considerable space savings, however that doesn't appear to be the case.This is the output of sp_spaceused for my table
name rows reserved data index unused
CommitmentsForPosting1660979 2740336 KB 1857104 KB312 KB882920 KB
After I updated the table to remove the xml, the output of sp_spaceused remained the same.My first thought was that it was probably statistics, so I updated statistics for the table, and nothing changed.I then updated statistics for everything in the database, still no change.I then ran DBCC CLEANTABLE for that table. I didn't really expect it to make a difference, and no surprise, it didn't.
The index on the table is a clustered index on just a GUID column.I rebuilt the index and again it still made no difference (that's a bit of a lie - index_size changed by a few hundred KB)my next test was to run 'select * into XXX from YYY' to create a copy of this table with the same data and data types. I also created the same clustered index from the original table onto the new one.If I then run sp_spaceused on this new copy of the table, I see what I expect to see in sp_spaceused - a table using approximately 256MB of space
name rows reserved data index unused
SPS_TEST 1660979 266400 KB 266400 KB 304 KB56 KB
To be honest, this isn't hugely critical, but I'm just curious as to why the original table is still reporting 2.6GB size, when I think it should probably be nearer 256MB.
SQL 2012 :: Size Of Null Column In Table
Jul 8, 2015Does null column take storage in table ? I created the following table:
drop table [dbo].[TBL_orig]
CREATE TABLE [dbo].[TBL_orig](
[1] [bigint] NOT NULL,
[2] [bigint] NULL,
[3] [bigint] NULL,
[4] [bigint] NULL,
[5] [float] NULL,
[Code] ....
Does null value will take a place even no data insert to this columns and if yes this answer is 4 mb is logical gap ?
SQL 2012 :: Partitioning A Large Dimension?
May 9, 2014The SQL CAT team's recommendation is to avoid partitioning dimension tables: URL.....I have inherited a dimension table that has almost 3 billion rows and is 1TB and been asked to look at partitioning and putting maintenance in place, etc.I'm not a DW expert so was wondering what are the reasons to not partition dimensions?
View 7 Replies View RelatedSQL 2012 :: Data Size Of Table Is Not Reduced Even After Deleting Millions Of Rows
Sep 21, 2015I have deleted nearly 30 million rows from a table. But however when I used the sp_spaceused command to calculate the data occupied by the table I don't see any difference in the data size of the table. In fact the data has increased to few MBs after the deletion, but not much.
View 8 Replies View RelatedSQL 2012 :: Composite Key Partitioning In Tabular Model
Jun 17, 2014I have a question about partitions in both SQL Server table and Tabular Model. I started to use Tabular Model recently.
I need to partition a table that collects daily rows for different clients.
The natural partition key is a combination of clientID+dateID (something like CL-YYYYMMDD)
I created a configuration table with a primary key PartitionID IDENTITY(1,1) , that contains also the field clientID and dateID
Every day I add a new row in it and I get a partitionID for the new client and date
Then I created a partitioned fact table using PartitionID as the partition field, using the partition function and the partition schema as well.
The daily client data is inserted in the partitioned table using the partitionID
Everything works fine, and the data are loaded correctly into the partitioned fact table.
Then I created a Tabular Model where the fact table is the partitioned table, and I created tabular model partitions using something like "select <field list> from PartitionedTable where partitionID = <partitionID>"
In this way, every day I load partitioned data in both sql server and tabular model. I have two dimensions, client and calendar
Now my question is: when I browse the Tabular Model, and I'm selecting a specific dimension date and dimension client, am I using the partitionID index correctly?
Or should I put in the tabular model partition query something like "select <field list> from PartitionedTable where clientID = <clientID> and dateID = <dateID>"? In this case is still working the partitionID index? How can I check it?
DB Design :: Table Partitioning Using Reference Table Data Column
Oct 7, 2015I have a requirement of table partitioning. we have 10 years of data on a table which is 30 billion up rows on 2005 server we are upgrading it to 2014. we have to keep 7 years of data. there is no keys on table or date column. since its a huge amount of data and many users its slow down the process speed. we are thinking to do partition on 7 years for Quarterly based. but as i said there is no date column on table we have to use reference table to get date. is there a way i can do the partitioning with out adding date column on table? also does partition will make query faster?
I have think three ways to do it.
1. leave as it is.
2. 7 years partition on one server
3. 3 years partition on server1 and 4 years partition on server2 (for 4 years is snapshot better?)
SQL Server 2012 :: Backed Up Transaction Log - Log Still Same Size
Feb 24, 2015I backed up my transaction log file using this:
BACKUP LOG iTest2_AELetters TO DISK = N'nul'(yes I know this breaks the log chain - it's expected in this intance)
But after I run it my t log is exact same size. I have refreshed many times.
I am using SQL Always On on this DB.
Moving Multiple Databases Of 500GB
May 3, 2006Hi
I have to move 5 Databases from production server to another server. I know it can be done by Backup and Restore and then make sure that all User names, Passwords and roles are not changed.
Some one can please help me out in giving a step by step process.
Thanks.
Bob
SQL Server 2012 :: MDF And LDF Size For Spreadsheet - Multiple Databases
Aug 28, 2015I need a script that will return the mdf & ldf for multiple databases.
I am currently running...
sp_helpdb 'TestDataname'
...and copying the size of the mdf and ldf into an excel spreadsheet.
How can I get the mdf AND ldf file size for all of the databases in an instance? I need the MDF and LDF seperated and I want the actual size of the file as it appears on the file system.
Transact SQL :: Size Of Foreign Keys In Server 2012?
Jun 30, 2015I have question about the size of foreign key’s in sql-server 2012. If I in one table had a foreign key of the “INT” type. Do it still cost 4 bytes of storage?
View 6 Replies View RelatedPartitioning A Table
Mar 27, 2008i have a table named "user" in which user which are located at different places within a city are recorded.
i want to group user with respect to there location like users of northern region are recorded first then users of western region and so on.
tell me from horizontal and vertical partitioning wh technique is better or i should use some other technique.
thanks for ur consideration.
Table Partitioning
Nov 14, 2000Hi,
I want to know more on table partitioning.I do not know where to get the right info.from.
I have a doubt - if a table is partitioned horizontally how does a query identifies where to pick up the data from i.e. from which part of partitioned table?
Table Partitioning
Jun 16, 2008i want to partition a table containing about 3 million rows. The partition column will be of datetime type.
following is the partition function i have used
create partition function MyPartFun
(datetime) as range left for values ('07/30/2007','09/30/2007','11/30/2007','01/30/2008','04/30/2008')
following is the partition scheme i have used
create partition scheme PartScheme as
partition MyPartFun all to ([primary])
i know how to add partition column while creating the table
But dont know how to add above partition scheme to an already populated table
Plz help...
Table Partitioning
Apr 24, 2007Hi,
I have a database created using Enterprise Manager Wizard.
For example datafile db1_data.mdf and log file db1_log file exists.
All the tables are created in datafile db1_data.mdf.
Now to improve performance I want to implement table partitioning.
Can anybody tell me howto implement it with existing strutcure.
Suppose there is table Mytable in which all update and delete actions are performed regularly.And it contains about 10,0000 records.
I want to partition the table so that it contains 5000 records.
Solution with example highly appreciated.
Satish
Table Partitioning
Dec 13, 2007Hi Experts,
I am new to Table Partitioning, Can any body guide me how to do table partitioning?
any way here is my scenario, we are having one database called "DATA" in SQL 2000 server and we have migrated to SQL 2005 by using backup and restore. and "DATA" is having about 15 tables and they are very very very big in size. and they dont have any index on a coulum name "DATETIME", but i want make table partition according to that perticular field "DATETIME" and right present we are having 6 months of data.
So, how to proceed further?
Your help will be appreciable..
SQL Table Partitioning
Mar 19, 2007
i am trying to partition an sql table in sql server 2005, i created the partition schema and the data files that i want the data to be filled in after the partition. After the partition is finished sql gave me partition is successful , but i noticed that the size of data files i created has not increased and their sizes are the same.
notice: i have a clustered index on this table, so i dropped this index and recreated it
Bellow the script that i am using
and thank you for your help in advance
What Does Mean Table Partitioning ?
Mar 7, 2008Hello frnds....what does mean by this ?
View 1 Replies View Related[Table Partitioning] What Is The Best Method?
Oct 11, 2006Hello,
I have a Sql Server 2005 database with many tables, each with millions of records within them.
They all have a Receive Date field, with records going back 10 years or so.
What would be the best way to partition it? I was thinking of partitioning them by years, but that would give me 10+ partitions -- would that be alot of overhead?
~Le
Partitioning A Large Table - How Much Is Too Much?
Nov 14, 2007Hi folks! I'm looking for advice on partitioning a large table. In the DDL below I've changed names to protect the guilty.
My table has this schema:
CREATE TABLE [dbo].[BigTable]
(
[TimeKey] [int] NOT NULL,
[SegmentID] [int] NOT NULL,
[MyVal] [tinyint] NOT NULL
) ON [BigTablePS1] (TimeKey) -- see below for partition scheme
alter table [dbo].[BigTable] add constraint [PK_BigTable]
primary key (timekey asc, SegmentID asc)
-- will evaluate whether this one is needed, my thinking is yes
-- based on the expected select queries.
create index NCI_SegmentID on BigTable(SegmentID asc)
The TimeKey column is sort of like a unix time. It's the number of minutes since 2001/01/01, but always floored to a 5 minute boundary. so only multiples of 5 are allowed.
Now, this table will be rather big. There are about 20k possible SegmentIDs. For every TimeKey from 2008/01/01 to 2009/01/01 (12 months), I'll have on the order of 20000 rows, one for each SegmentID.
For the 12 month period, there are 365*24*60/5=105120 possible TimeKey values. So the total rowcount is over 2 billion. (20k * 105120)
Select queries are expected to be something like this:
-- fetch just one particular row...
select MyVal from BigTable
where TimeKey=5555 and SegmentID=234234
--fetch for a certain set of SegmentID and a particular time...
select
b.SegmentID
,b.MyVal
from BigTable b
join OtherTable t on t.SegmentID=b.SegmentID
where b.TimeKey=5555
and t.SomeColumn='SomeValue'
Besides selects, also I need to be able to efficiently issue update statements against the table with new values in the MyVal column based on a range of TimeKey values (a contiguous span of a few days) and sets of about 1000 SegmentID. updates would always look like this:
update t
set t.MyVal=p.MyVal
from BigTable t
join #myTempTable p on t.TimeKey=p.TimeKey
and t.SegmentId=p.SegmentId
where #myTempTable would have order of 1000*24*60 rows in it, all with contiguous TimeKey values, and about 1000 different SegmentID values. #myTempTable also has a clustered pk on (timekey asc, SegmentId asc).
After the table is loaded, it would never get any inserts or deletes. only selects and updates.
Given the size, and the nature of the select and update queries, this table seems like a good candidate for partitioning. I'm thinking it makes sense to partition on TimeKey.
So my question is, is it stupid to create a separate partition for each day in the year long span of TimeKeys this table covers? That would mean 365 partitions in the partition function and partition scheme. Something like this:
CREATE PARTITION FUNCTION [BigTableRangePF1] (int)
AS RANGE LEFT FOR VALUES
(
3680640 + 0*1440, -- 3680640 is the number of minutes between 2001/01/01 and 2008/01/01
3680640 + 1*1440,
3680640 + 2*1440,
3680640 + 3*1440,
...snip...
3680640 + 363*1440,
3680640 + 364*1440,
3680640 + 365*1440
);
GO
CREATE PARTITION SCHEME [BigTablePS1]
AS PARTITION [BigTableRangePF1]
TO
(
[PRIMARY],[PRIMARY],[PRIMARY],
...snip...
[PRIMARY],[PRIMARY],[PRIMARY]
);
GO
does anyone have any experience with partitioned tables with so many partitions? Is a few hundred partitions too many? From my understanding of partitions, seems like having so many will be ok. Is it somehow worse than having hundreds of tables in a database?
Even with one partition for each day, I'll still have 24*60*20000/5 ~ 5m rows in each one.
5m seems like a manageable number. 2b does not.
elsasoft.org
SQLServer Table Partitioning
Jun 5, 2007Hi!I have a question:I already have a DB that uses partitions to divide data in USCounties, partitioned by state.Can I use TWO levels of partitioning?I mean... 3077 filegroups and 50 partition functions that addressthem, but can I use another function to group the 50 states?Thanks!Piero
View 15 Replies View RelatedTable,index Partitioning
Apr 30, 2007We had data in tables for multiple users (Logins) .Each user data is identified by a one column named USER?. No user has direct access to tables and only through views .we have created views and stored proc .Views will perform DML operations on tables using condition WHERE USER=SUSER_SNAME() (i.e Logged in user).So no point of getting others user data.
Each table has a column USER and we are queering data based on login user .this is the foreign key of USER table. Each view contains user column in where clause .So for every query we are searching all records .instead of that is there any way to get data with out searching all records.
I heard about table Partitioning, index Partitioning, view Partitioning. Are they helpful to boost my query performance?
And also let me know is there any good way of designing apart from above options
Table Locking In Partitioning
Aug 10, 2006Hi,
I have the following doubt about table lockinglocking in case of partitioning:-
Say we have 5 partition on the table Employee on the key Joining_Date and when we run 5 select queries on each of the parition in parallel will there be locking on the table when the 1st query is running or all the 5 queries can run in parallel. Basically, I am trying to see if parallelism and partitioning can work in sync or there will be locking at the table level if I don't specify any query hints?
Any help in this regard is highly appreciated.
Thanks,
Ritesh