How can I query how much time a SQL server database restore takes? - sql-server

Question

Im trying to write a query that will tell me how much time a restore (full or log) has taken on SQL server 2008.
I can run this query to find out how much time the backup took:
select database_name,
[uncompressed_size] = backup_size/1024/1024,
[compressed_size] = compressed_backup_size/1024/1024,
backup_start_date,
backup_finish_date,
datediff(s,backup_start_date,backup_finish_date) as [TimeTaken(s)],
from msdb..backupset b
where type = 'L' -- for log backups
order by b.backup_start_date desc
This query will tell me what is restored but now how much time it took:
select * from msdb..restorehistory
restorehistory has a column backup_set_id which will link to msdb..backupset, but that hold the start and end date for the backup not the restore.
Any idea where to query the start and end time for restores?

Answer 1

To find the RESTORE DATABASE time, I have found that you can use this query:
declare #filepath nvarchar(1000)
SELECT #filepath = cast(value as nvarchar(1000)) FROM [fn_trace_getinfo](NULL)
WHERE [property] = 2 and traceid=1
SELECT *
FROM [fn_trace_gettable](#filepath, DEFAULT)
WHERE TextData LIKE 'RESTORE DATABASE%'
ORDER BY StartTime DESC;
The downside is, you'll notice that, at least on my test server, the EndTime is always NULL.
So, I came up with a second query to try and determine the end time. First of all, I apologize that this is pretty ugly and nested like crazy.
The query below assumes the following:
When a restore is run, for that DatabaseID and ClientProcessID, the next EventSequence contains the TransactionID we need.
I then go and find the max EventSequence for the Transaction
Finally, I select the record that contains RESTORE DATABASE and the maximum transaction associated with that record.
I'm sure someone can probably take what I've done and refine it, but this appears to work on my test environment:
declare #filepath nvarchar(1000)
SELECT #filepath = cast(value as nvarchar(1000)) FROM [fn_trace_getinfo](NULL)
WHERE [property] = 2 and traceid=1
SELECT *
FROM [fn_trace_gettable](#filepath, DEFAULT) F5
INNER JOIN
(
SELECT F4.EventSequence MainSequence,
MAX(F3.EventSequence) MaxEventSequence, F3.TransactionID
FROM [fn_trace_gettable](#filepath, DEFAULT) F3
INNER JOIN
(
SELECT F2.EventSequence, MIN(TransactionID) as TransactionID
FROM [fn_trace_gettable](#filepath, DEFAULT) F1
INNER JOIN
(
SELECT DatabaseID, SPID, StartTime, ClientProcessID, EventSequence
FROM [fn_trace_gettable](#filepath, DEFAULT)
WHERE TextData LIKE 'RESTORE DATABASE%'
) F2 ON F1.DatabaseID = F2.DatabaseID AND F1.SPID = F2.SPID
AND F1.ClientProcessID = F2.ClientProcessID
AND F1.StartTime > F2.StartTime
GROUP BY F2.EventSequence
) F4 ON F3.TransactionID = F4.TransactionID
GROUP BY F3.TransactionID, F4.EventSequence
) F6 ON F5.EventSequence = F6.MainSequence
OR F5.EventSequence = F6.MaxEventSequence
ORDER BY F5.StartTime
EDIT
I made some changes to the query, since one of the test databases I used is case-sensitive and it was losing some records. I also noticed when restoring from disk that the DatabaseID is null, so I'm handling that now as well:
SELECT *
FROM [fn_trace_gettable](#filepath, DEFAULT) F5
INNER JOIN
(
SELECT F4.EventSequence MainSequence,
MAX(F3.EventSequence) MaxEventSequence, F3.TransactionID
FROM [fn_trace_gettable](#filepath, DEFAULT) F3
INNER JOIN
(
SELECT F2.EventSequence, MIN(TransactionID) as TransactionID
FROM [fn_trace_gettable](#filepath, DEFAULT) F1
INNER JOIN
(
SELECT DatabaseID, SPID, StartTime, ClientProcessID, EventSequence
FROM [fn_trace_gettable](#filepath, DEFAULT)
WHERE upper(convert(nvarchar(max), TextData))
LIKE 'RESTORE DATABASE%'
) F2 ON (F1.DatabaseID = F2.DatabaseID OR F2.DatabaseID IS NULL)
AND F1.SPID = F2.SPID
AND F1.ClientProcessID = F2.ClientProcessID
AND F1.StartTime > F2.StartTime
GROUP BY F2.EventSequence
) F4 ON F3.TransactionID = F4.TransactionID
GROUP BY F3.TransactionID, F4.EventSequence
) F6 ON F5.EventSequence = F6.MainSequence
OR F5.EventSequence = F6.MaxEventSequence
ORDER BY F5.StartTime

Answer 2

Make it a Job. Then run it as the Job. Then check the View Job History. Then look at the duration column.

Answer 3

While it is running you can check something like this dmv.
select
d.name
,percent_complete
,dateadd(second,estimated_completion_time/1000, getdate())
, Getdate() as now
,datediff(minute, start_time
, getdate()) as running
, estimated_completion_time/1000/60 as togo
,start_time
, command
from sys.dm_exec_requests req
inner join sys.sysdatabases d on d.dbid = req.database_id
where
req.command LIKE '%RESTORE%'
Or you can use some magic voodoo and interpret the transaction log in the following table function, however the only person I know to understand any info in this log is Paul Randal.
I Know he sometimes checks Server Fault, but don't know if he wonders StackOverflow.
select * from fn_dblog(NULL,NULL)
Hope this helps.
If you manage to use this and find a solution please tell us.
Good Luck!