Index Fill Factor % Rules Of Thumb??
Mar 21, 2007Are there any rules of thumb to apply when entering the Index Fill Factor?
I just want to make sure I'm enter a optimal value.
Using MS SQL 2000.
Thanks!
--PhB
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Index Fill Factor > 100 !!
Sep 14, 1998I have some non-clustered , non-unique indexes on a medium sized table (25,000 rows).
The fill factore is showing 248% on these indexes. I have tried setting the fill factor to various values 100% or less. The re build index seems to work, however the est min/avg/max size of the index all show appx 160Kb, whilst the actual size is in excess of 50Mb !!
We run a weekly rebuild of all indexes overnight, without any fill params and following this the fill on these indexes goes back to 248% !
I have also dropped and re-created the index with a fill of 100%, and it has still reverted to 248% following the weekly rebuild.
I have also looked at the server config, and the fill factor there shows a running value of 171% !!, although the current config is set to 0.
The server is stopped every evening, so no way should the config have a value of 171, especially since the max allowed value is 100.
Any advice/assistance would be gratefully received.
Clustered Index Fill Factor
Jul 20, 2004If I have a clustered index on only one column of the table, the column being the primary key and an identity column ( int datatype, Ascending CIDX), then can I go ahead and have the Fill Factor be 100%. I may add more rows at a later date to the table.
Let me know.
X64 DB Mirroring - Any Rules Of Thumb?
Aug 28, 2007
Hi All,
I'm looking to mirror 17 servers from geographically dispersed locations around the UK to one central location.
Is there any rule of thumb to take into account server spec, memory requirements, DB Size
E.G. an x64 server can be the mirror for 30 databases provided it has x GB Memory ?
Cheers,
Steve
Fill Factor Fix
Apr 3, 2001Currently we have tables (in sql 6,5), many of them do not have primary keys.
While I was trying to re-index (re-org), many of them got an error:
"fillfactor 204 is not a valid percentage; fillfactor must be between 1 and 100."
(many tables' fillfactor exceed 100 or more...)
How can I fix them so I can upgrade to sql 7 ?
Thank you for your help.
Fill Factor
Aug 13, 2001I am really confused about this whole fill factor thing. The way I understand it, is if you have a table whose data remains pretty much static, you should use a higher fill factor. Suppose you had a database where you had at most 150 transactions a day that changed the data, should the fill factor be left at the default(0) or increased? How do you determine how much to increase it? Is there a rule of thumb that suggests if you have x number of changes against a table, you should have a fill factor between y and z percent?
Please Help
Chris
Fill Factor
Mar 12, 2001Hi all,
While creating indexes for a table, I specified a fill factor of 70%. I then inserted a few hundred rows into the table. Is it possible to check to what percent the pages are full after the rows have been inserted?
Thanks in advance,
Praveena
Fill Factor
Jul 16, 1999You have a db with 50,000 records and you want to add 100,000 more. What should the right fill factor be? Is there a way to "calculate" a fill factor if you don't want to use default? Any help is appreciated. Thank you.
View 3 Replies View RelatedFill Factor
Jan 18, 2005If fill factor is specified as 100 for a table what will be the impact of this?I want to know any updation or insertion will be possible or not?
View 3 Replies View RelatedHow To Set Fill Factor?
Aug 27, 2007Hellow, everyone"
I have a web online table that is inserted about 1500 record one day. Each night, a DST is running to pull all data to anther database. How to set fill factor on a one column index to get the best performance? Current fill factor is 80%.
Thanks
ZYT
Fill Factor
Jul 13, 2007Hi experts, I would like to ask regarding FILL FACTOR. I observed that our system's loading is a bit slow, and some of the modules take 1 to 2 minutes loading. Maintenance activity is regularly executed based on the scheduled sets. Then I tried to checked the tables indexes/keys turns out that the FILL FACTOR is set to ZERO(0). I would like to know if the FILL FACTOR set to zero will be a factor for the system to slow down..????
Darren Bernabe Blanco
Fill Factor
Jul 14, 2006How do i find out how much fill facot has been spcified in given table?.
View 1 Replies View RelatedFill Factor -discussion
Apr 4, 2001What are the criteria to decide the optimal(or close to optimal) fill factor?
Any input is appreciated.
How To Calculate Fill Factor?
Aug 9, 2001You have 50,000 records in a database file and you know you want to add another 100,000 records in the next several weeks. What fill factor would you use to maximize performance?
A.0(default setting)
B.30
C.70
D.100
which one is correct? And how to calculate fill factor?
Fill Factor And Performance
Jun 7, 2002I know what fill factor is ... and know that I should set it high when I have static data tables (where the data rarely changes) and low when I expect to have page splits ...
but does anyone know what affect on performance this setting has ? I don't quite get what Books Online says about it.
Thanks
Carol
What Is Fill Factor For Indexes
Aug 25, 2004Hi ,
Can u plz tell me what is fill factor and what its role in defining the indexes. It is by default 0% and can be set upto 100%, but what it makes difference if i change the percentage? Where it is exactly impacts? If u know any links then plz forward me.
Thanks And Regards,
Shailesh
How To Add 'Fill Factor' In The SQL Script
Oct 13, 2004I am trying to set up the relationship (Primary Key and Forign Key) in several tables. I would like to find a way also be able to set 'Fill Factor = 90%' in the script. Here is the code that i have so far:
ALTER TABLE Req
ADD CONSTRAINT FK_Req_Bow FOREIGN KEY ( BowID )
REFERENCES Bow ( BowID )
Any help would be greatly appreciated!
J827
Fill Factor In Indexing
Feb 21, 2008Hi there
Is there any such thing that you can find the current Fill Factor for each indexing? The only thing that you have an indication is by looking at DBCC SHOWCONTIF > Scan Density [Best Count:Actual Count].......: 100.00% [0:0] and if this value is not reaching 100% means may have an issue with fill factor ?!!?
Also, how about SQL2000?
Thanks
Default Fill Factor
Jul 20, 2005HiThere are a lot of articles about the fillfactor.I did change the fill factor and that did not work as intended.How do I get back to the default fill factorI am using sp_msforeachtable undocumented database procedureand when the indexes are rebuilt the fill factor that shows upin origfillfactor is the one I am trying to move away fromYour help will be appreciatedVince
View 4 Replies View RelatedFill Factor Confusion
Jul 31, 2007Turn away pure key zealots
I have a clustered index that starts with an INT IDENTITY(1,1) column and therefore you can only add data to the end of the cluster. What I'm confused about is the relationship between this and the fill factor. In a normal fill factor scenario you'd be worried about inserts causing page splits but if you can only append to this cluster does this mean I should set the factor to 100% even if I'm expecting a large number of inserts? Basically I don't understand what happens when you run out of space on a page on a B-tree if it's based upon an ever increasing number.
Database Defaulting To Fill Factor = 90
Aug 19, 2002The tables in my database somehow are getting set with a fill factor of 90. In the properties of the server/Database Setting, the "Fixed" option is unchecked. Last Friday, I reset the each table to have a fill factor of zero, but when I came in today, the tables reset themselves to having a fill factor = 90. Any ideas of why this is happening and how I can stop this? Your help is greatly appreciated.
Mark
Pl Explain About Fill Factor In Sql 2005
May 27, 2008Hi,
Now i am doing a R&D on indexes in SQL 2005. I want to know clearly what is the actual uses of Fill Factor? What is advantage and disadvantage of it?
Where it should use this fill factor?
Please answer me as soon as possible.
Ganesh.
SQL Server 2008 :: Fill Factor And SSD Based SAN?
Jun 14, 2015I am about to rebuild all my indexes on a database that is very heavily fragmented. In looking at the report, seems that 80% or more tables are 90%+ fragmented.
My understanding is that fill value value is used for performance reasons. Our shiny new backend SAN is 100% SSD. If solid state can provide a sub-millisecond response, is fill factor still necessary at the cost of additional space being used used?
SQL 2012 :: Re-Indexed With Wrong Fill Factor And Now All Databases Are Huge
Jan 24, 2015As the title says I re-indexed all of my databases using the wrong fill factor. Instead of using 90% as the fill factor I misunderstood and set this at 10%. So I believe my databases are now packed with a ton of unused space. The DB sizes should be about 5-6 GB but have since grown to 20-40GB. I am very new to SQL administration and don't know of a safe way to remove this unused space so that my databases return to their normal sizes. The databases do not grow very much at all so the free space is not really that necessary.
View 9 Replies View RelatedSQL Server Admin 2014 :: Rule Of Thumb For Sizing Log Space During Index Maintenance?
Sep 13, 2014I've been fixing some issues lately where weekly maintenance has been causing logs to grow and filling disks.
Is there any rule of thumb for allocating log space for doing reorgs and rebuilds in a worst case scenario? I'm thinking 3x the largest database size?
I've been watching them run on databases in the range of 50GB where the logs are growing well over that for rebuilds or even reorgs. Once you have a few databases like this on a server, you can suddenly eat through a lot of disk space just for holding logs during maintenance.
Is &"Fill Factor&" Same As&"Change Free Space&"option?
Aug 21, 2007Is the "Fill Factor" percentage is same as the "change free space per page percentage to" option in the Rebuild Index task wizard?
OR Is it inverse of it ?
Any comments and suggestions are welcome.....
Jas
Clustered Index Fill
Nov 6, 2001I am a little confused about what fill factor to use in creating a clustered index on one of our major tables.
This table has about 4.5 million rows and currently there are 14 indexes associated with it, but no clustered index.
I want to create a clustered index (on datestamp )on this table, but cannot really grasp what fillfactor I should use.
The main use of this table is in daterange reporting.
No deletes are applied to this table(except archiving on an annual basis).
It grows by about 5 000 rows daily.
From what I have read in BOL, a high fillfactor(100) is only applicable for a read only table, and I feel that at the time of creating a clustered index on this table, it is readonly, cos the data will never need to be reorganised to insert a new row into it, only at end.
BOL states that a low fillfactor could degrade database read performance,
and where the vast majority of our processing(reporting) hits this table,that is a major concern.
BUT BOL also says that a low Fillfactor is recommended where there are changes to the data.
Space is obviously important, but access speed is overwhelmingly more important.
Should I use a fillfactor of 70/80/90 etc. Any help would be appreciated
SQL Server 2012 :: Rule Of Thumb When To Disable Indexes?
Jun 19, 2014It's often said or done that when inserting or updating into a 'large' table that disabling the non-clustered indexes can is needed for performance.
Now I know the obvious way to find out if this is best or not is by testing the different options. I was wondering if there was a rule of thumb to this?
Say you have a table with half a billion rows and 4 non-clustered indexes and are only updating half a million rows then sometimes disabling every night and re-enabling can take way more time than the actual update. Haven't found an articles advising to disable them when a table is over X rows and you are updating Y% of them...
Rule Of Thumb About Number Of Attributes And Data Points?
Nov 16, 2006This is a general question about data modeling. I'm more curious than anything else.
There is much talk about over-training data model, and I'm sure there are under training as well. As a rule of thumb, depending on the algorithm, what is a good ratio of attributes vs data points?
-Young K
Performance Factor
May 20, 2008How Index will help to optimize SP.
spatle
Difference Between Index Seek && Index Scan && Index Lookup Operations?
Oct 20, 2006please explain the differences btween this logical & phisicall operations that we can see therir graphical icons in execution plan tab in Management Studio
thank you in advance
Attribute 'importance' Factor
Jan 31, 2008Is there a way to explicitly assign 'weights' or 'importance' factors to attributes and have that to be considered by the association rules and decision trees algorithms during training? I would like to do so without preprocessing the data (In any case, I can't think on a way to assign weight with preprocessing to boolean attributes like 'smoker')
thanks
ADO.NET 2.0 Slows SP Execution By Large Factor
May 21, 2007I'm hoping someone will be able to point me in the right direction for solving this problem as i've come a bit stuck.
The Sql Server 2005 Stored Procedure runs in about 3 secs for a small table when run from SQL Management Studio (starting with dbcc freeproccache before execution) but times out when run through ADO.NET on .NET (45 sec timeout).
I've made sure the connection was closed prior to opening and executing the adapter. I'm a bit stuck as where to check next though.
Any ideas greatfully received, Thanks