SQL Server 2008 :: Partition Sliding Window Causing Loads Of Blocks

Oct 29, 2015

We have a massive database with an almost massive amount of traffic to and from it.

I've been requested to implement a sliding window partitioning with 2 partitions an active and passive 1,I managed to test this on a very small testbed last month.

I currently moved 97k table on to the partition function leaving me another 26 k to go

I'm using the following stored procedure to implement the sliding window

CREATE PROCEDURE [dbo].[ManageFactSlidingWindow](@pFunction nvarchar(max),@pSchema nvarchar(max),@FG nvarchar(max),@moveDays int)
/*****************************************************************************
PROCEDURE NAME: [ManageFactSlidingWindow]
AUTHOR: Arshad Ali
CREATED: 02/24/2013
DESCRIPTION: This stored procedure manages sliding window for the partitioned table

VERSION HISTORY:
DATE EMAIL Company DESCRIPTION

[Code] .....

When I try to move the partition even a single day I get loads of locks.

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Sliding Window Scenario On Partitioned Table

Nov 13, 2007

I began with a partition function as follows:

CREATE PARTITION FUNCTION [TimeTicksRangePFN](bigint) AS RANGE RIGHT FOR VALUES (633294720000000000, 633320640000000000, 633347424000000000, 633374208000000000, 633399264000000000)

These numbers happen to correspond to the dates 11/1/7, 12/1/7, 1/1/8, 2/1/8 and 3/1/8 in ticks respectively.

I began with a partition scheme as follows:

CREATE PARTITION SCHEME [TimeTicksRangePScheme] AS PARTITION [TimeTicksRangePFN] TO ([FG_xxx_EventArchive00001], [FG_xxx_EventArchive00002], [FG_xxx_EventArchive00003], [FG_xxx_EventArchive00004], [FG_xxx_EventArchive00005], [PRIMARY])

While running my “sliding window script� , which I hoped would 1) roll off the oldest partition of my EventArchive table and 2) add a new partition with a tick boundary that equates to 3/5/8, I get an error related to my switch out table's index, the same table's Filegroup and Primary.

After getting the error, I scripted the partition function as a create in mgt studio and got…

CREATE PARTITION FUNCTION [TimeTicksRangePFN](bigint) AS RANGE RIGHT FOR VALUES (633320640000000000, 633347424000000000, 633374208000000000, 633399264000000000, 633402720000000000)

...which looks like what I had intended cuz the last boundary is the tick representation of 3/5/8 and the oldest has rolled off

scripting the scheme produced...

CREATE PARTITION SCHEME [TimeTicksRangePScheme] AS PARTITION [TimeTicksRangePFN] TO ([FG_xxx_EventArchive00001], [FG_xxx_EventArchive00003], [FG_xxx_EventArchive00004], [FG_xxx_EventArchive00005], [PRIMARY], [FG_xxx_EventArchive00001])

which looks nothing like what I intended, I thought I’d end up with …00002,…00003,…00004,…00005,…00001,PRIMARY

the script steps that seem most relevant start at the 5th step as follows...

5) creates table [dbo].Switch on the switch out filegroup with columns, PK and indexes matching exactly those of [dbo].EventArchive

6) switches partition 1 of [dbo].EventArchive to [dbo].Switch

7) ALTER PARTITION FUNCTION TimeTicksRangePFN() MERGE RANGE (633294720000000000) --this was the oldest date corresponding to 11/1/7

8) truncates [dbo].Switch

9) drops all indexes on [dbo].Switch except a clustered index (IX_TimeTicks), leaves PK constraint alone

10) ships the new data whose values range from 3/1/8 to less than 3/5/8 to [dbo].Switch and deletes them from their source

11) recreates all non clustered indexes on [dbo].Switch

12)ALTER TABLE [dbo].[Switch] WITH CHECK ADD CONSTRAINT RangeCK CHECK ([TimeTicks] < the number of ticks represented by 3/5/8)

13)ALTER PARTITION SCHEME TimeTicksRangePScheme NEXT USED [FG_xxx_EventArchive00001] --fg isnt really hardcoded

14)ALTER PARTITION FUNCTION TimeTicksRangePFN() SPLIT RANGE (the number of ticks represented by 3/5/8)

15)ALTER TABLE [dbo].[Switch] SWITCH TO [dbo].[EventArchive] PARTITION 5

step 15 is the one that fails with message "ALTER TABLE SWITCH statement failed. index 'xxx.dbo.Switch.IX_TimeTicks' is in filegroup 'FG_xxx_EventArchive00001' and partition 5 of index 'xxx.dbo.EventArchive.IX_TimeTicks' is in filegroup 'PRIMARY'.

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Problem With Sliding Window Scenario On Partitioned Table...

Nov 7, 2007

I have a partition function as follows:
CREATE PARTITION FUNCTION [TimeTicksRangePFN](bigint) AS RANGE RIGHT FOR VALUES (633294720000000000, 633320640000000000, 633347424000000000, 633374208000000000, 633399264000000000)

These numbers happen to correspond to the dates 11/1/7, 12/1/7, 1/1/8, 2/1/8 and 3/1/8 in ticks respectively.

I have a partition scheme as follows:
CREATE PARTITION SCHEME [TimeTicksRangePScheme] AS PARTITION [TimeTicksRangePFN] TO ([FG_xxx_EventArchive00001], [FG_xxx_EventArchive00002], [FG_xxx_EventArchive00003], [FG_xxx_EventArchive00004], [FG_xxx_EventArchive00005], [PRIMARY])

After running my €śsliding window script€? , which I wanted to switch out the lowest partition with, and add a new partition with a new tick boundary that equates to 3/5/8, I get an error saying that 1 of my switch out table€™s indexes is in filegroup 1 but partition 5€™s index of the same name is in PRIMARY. At this point the partition function looks like€¦

CREATE PARTITION FUNCTION [TimeTicksRangePFN](bigint) AS RANGE RIGHT FOR VALUES (633320640000000000, 633347424000000000, 633374208000000000, 633399264000000000, 633402720000000000) which looks like what I had intended cuz the last boundary is tick representation of 3/5/8 and the oldest has rolled off

and the scheme looks like€¦

CREATE PARTITION SCHEME [TimeTicksRangePScheme] AS PARTITION [TimeTicksRangePFN] TO ([FG_xxx_EventArchive00001], [FG_xxx_EventArchive00003], [FG_xxx_EventArchive00004], [FG_xxx_EventArchive00005], [PRIMARY], [FG_xxx_EventArchive00001]) which looks nothing like what I intended, I thought I€™d end up with €¦00002,€¦00003,€¦00004,€¦00005,€¦00001,PRIMARY

the relevant script steps are...

5) creates table [dbo].Switch on the switch out filegroup with columns, PK and indexes matching those of [dbo].EventArchive (allows default location for indexes)
6) switches partition 1 of [dbo].EventArchive to [dbo].Switch
7) ALTER PARTITION FUNCTION TimeTicksRangePFN() MERGE RANGE (633294720000000000)
8) truncates [dbo].Switch
9) drops all indexes on [dbo].Switch except a clustered index (IX_TimeTicks), leaves PK constraint alone
10) ships the new data whose values range from 3/1/8 to less than 3/5/8 to [dbo].Switch and deletes them from their source
11) recreates all non clustered indexes on [dbo].Switch
12)ALTER TABLE [dbo].[Switch] WITH CHECK ADD CONSTRAINT RangeCK CHECK ([TimeTicks] < the number of ticks represented by 3/5/8)
13)ALTER PARTITION SCHEME TimeTicksRangePScheme NEXT USED [FG_xxx_EventArchive00001]
14)ALTER PARTITION FUNCTION TimeTicksRangePFN() SPLIT RANGE (the number of ticks represented by 3/5/8)
15)ALTER TABLE [dbo].[Switch] SWITCH TO [dbo].[EventArchive] PARTITION 5

step 15 is the one that fails with message "ALTER TABLE SWITCH statement failed. index 'xxx.dbo.Switch.IX_TimeTicks' is in filegroup 'FG_xxx_EventArchive00001' and partition 5 of index 'xxx.dbo.EventArchive.IX_TimeTicks' is in filegroup 'PRIMARY'.

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ALTER TABLE Orders
SWITCH PARTITION 1
TO OrdersOctober2002
and
ALTER TABLE OrdersOctober2004
SWITCH TO Orders PARTITION 24
run. For the data being switched out, I wouldnt want to do anything extra. For the data being switched in, I'd like to understand if she is implying that all other indexes would be built automatically as a result of the 2nd ALTER statement?

Kimberly's article is at http://www.sqlskills.com/resources/Whitepapers/Partitioning%20in%20SQL%20Server%202005%20Beta%20II.htm#_Toc79339965

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Hi



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