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use SQLSentry
-- use SentryOne -- depends if new install, or upgrade
create procedure dbo.BatchDeletePerformanceAnalysisDataTableAndIndexCounterData
@EndDateTime DateTime,
@MaxIterations int = 1,
@BatchSize int = 1000
Anders Pedersen
Made to batch delete data out of the PerformanceAnalysisDataTableAndIndexCounter table.
Delete statement provided by SentryOne could not handle a lot of data without
a lot of manual intervention (manual batches).
This uses the column with the primary key on it for deletes instead of the timestamp column,
this substantially speeds up deletes.
set nocount on
--set DEADLOCK_PRIORITY low -- if you see a lot of other processes being victim, set this
--(unless it is more important to get it cleaned up than loosing a few records)
-- get first time stamp
declare @BeginTimeStamp int, @EndTimeStamp int
declare @BeginID bigint, @EndID bigint
-- sanity check, do not let it delete to a date less than 15 days back. Making it 16 to cover the entire day. Close enough
if DATEDIFF(day, @EndDateTime, getdate()) <= 16 or @EndDateTime is null
set @EndDateTime = DATEADD(day, -16, getdate())
select @EndTimeStamp = [dbo].[fnConvertDateTimeToTimestamp] (@EndDateTime)
-- get ID for that newest one to delete
select @EndID = max(id) from PerformanceAnalysisDataTableAndIndexCounter with (nolock) where Timestamp <= @EndTimeStamp -- this step takes time, 2ish minutes
select @BeginID = min(id) from PerformanceAnalysisDataTableAndIndexCounter with (nolock) where ID <= @EndID
declare @cnt bigint = 0
declare @X int = 1
while @x <= @MaxIterations and @BeginID < @EndID
if @x <> 1 -- skip wait on first iteration. Save time if you only running small batches
waitfor DELAY '00:00:03'; -- 3 second delay to let transactions through. This might need adjusted
with CTE as
select top (@BatchSize) * from PerformanceAnalysisDataTableAndIndexCounter where ID between @BeginID and @EndID order by ID asc
delete from CTE
select @cnt += @@ROWCOUNT
set @x +=1
select @cnt as RecordsDeleted
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