Unable to shrink datafile

Hello Gurus,
Env: SQL Server 2008 R2 installed on Windows Server 2008.
DAS based storage.
Issue: DBCC showfilestats shows that all of the exents are used. This means there is no
Unable to shrink the data file.
Description: The data file is growing by a GB every day approx.
I see the existing space with in the data file is not being used and it is allocating fresh extents every time.
When I do the DBCC showfilestats it says all of the extents are in use and there is almost nothing free.
The size of the data file is 200 GB.
When I run the top 50 tables by size, I see the sum of all of these tables is hardly 10GB.
I know there is not much data with in the tables.
When I am trying to shrink the data file, it gives the error message "A severe error occurred on the current command."
I tried to follow the following till date, nothing worked till date.
DBCC checkDB and then tried to shrink.
Took the database in the single_user mode and then tried to shrink.
Ran a checkpoing and then the log backup job and then tried to shrink.
So there are two questions.
1. How shall we shrink the data file?
2. Why is it not using the existing space with in the file?
Please letme know if I need to send more details.

1. How shall we shrink the data file?
Why would shrink it, when The data file is growing by a GB every day approx. Database files should rather not autogrow. They should be extended well in advance in a maintenance window. I would suggest that you increase the database
with 50 GB.
Shrinking a database is a very exceptional operation which you only do when you know that the data size has been reduced on a permanent basis.
2. Why is it not using the existing space with in the file?
It is not clear how you have deemed that there is space in the file; au contraire, all evidence points at that is no space available.
It is possible, though, that your data pages are poorly utiliized. Heaps are particularly prone to this, and you can be left with pages with no or little rows on them.
Do you rebuild your indexes regularly? Do you have any heaps? What does this query return:
SELECT COUNT(*) FROM sys.indexes WHERE index_id = 0
Erland Sommarskog, SQL Server MVP, [email protected]

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2      alc_bks     NUMBER;
3      alc_bts     NUMBER;
4      unsd_bks    NUMBER;
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6      luefi       NUMBER;
7      luebi       NUMBER;
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Make sure the application is returning all the connection to the pool (close
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sree
"nambudri" <[email protected]> wrote in message
news:3c33e8f1$[email protected]..
HI,
I am using weblogic 6.1 connection pooling. I am facing problem in
shrinking
the connections
I set the connection parameters as
Initial capacity = 2,
Increment = 1
Max capacity = 10
Allow shrinking = true
When I open 4 sessions simultaneously it shows the
connections = 4
total connections = 4
Waiters = 0
Connections high = 3
After several time accessing the database it shows
Connections = 0
Total connections = 13
Connections high = 3
Waiters = 0
My problem is even after shirking time also it shows the active connections
in
the database side(I tested using v$session).are there any extra setting is
needed
for the shrink to take place?(other than setting it to true in console). I
even
tested using the code ( getting the pool and executing the shrink() method).
My second doubt was why it is showing total connections as greater than
maximum
capacity. I am not clear on the no shown for total connections.
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Hello,
Usually,the tlog backup goes to tape but it's giving some error.I took the backup on disk and then doing tlog shrink but it's not happening.
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Best regards,
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Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

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