Cumulative Wait Time On Server Replies ???
Jul 20, 2005
Hello all,
I've got a query which suddently became very slow. It now takes about 10
secs instead of 2 secs.
I've got to identical DB (one is for test and the other is production). The
query is slow only in production.
When running this query in both DB and looking at execution plan,
statistics, etc, the onle difference is the Cumulative wait time on server
replies.
In test DB, I get the value: 2200
And in production DB: 1.22344e+009
What does this mean concretly? What do I have to do to solve this problem?
TIA.
Yannick
PS I'm using SS2000 SP3 on NT4.0
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Jan 6, 2008
I setup a SQL Agent to send me an email when the Average Latch Wait Time is greater than 300ms. Now I receive an email every 15 seconds stating that the current ALWT is 3916ms. That value never changes with the emails. However, the perfmon shows nothing at all (shows zero).
I also have a Buffer cache hit ratio of 2848.00.
These numbers are when there is NOBODY on the DB at all It is just sitting there. When I reboot the server, as soon as SQL starts it starts to send the emails again.
Server: Intel Xeon Quad Core 2.66
RAM: 4GB (with /3GB in the boot.ini)
RAID 1: OS
RAID 1: Data (DB and logs)
CPU Utilization: 0-1%
RAM Utilization: 527MB
OS: Server 2003 R2 With SP2
SQL: 2005 Standard with SP2
How can I determine if the ALWT is really 3916?
I executed 'Select * from sysprocesses where SPID>50 and waittime>0'
Which showed;
BROKER_RECEIVE_WAITFOR
waittime=110640ms
waittype=0x0075
status=suspended
program_name=DatabaseMail90 - Id<3780>
Any assistance is greatly appreciated.
Thank You
Magnum
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Hi,
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hi.
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In the example below, math is taken in all three terms and the current term's mark is included in the GPA but not the previous terms because current terms mark is higher. Two classes (bio,chem) are taken in third term but not included due to marks being higher in second term.
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[Code] .....
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This is the scenario in my environment
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WRITELOG920039.89887485.89 32554.00 23446032975.02
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 May 4 2015 19:11:32
 Copyright (c) Microsoft Corporation
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I am in the process of moving a SQL2000 database to a SQL2005 database.
Porting from: SQL200, Windows Server 2000(SP4) (32 bit dual processor)
to:SQL2005, Windows Server 2003(SP1) (x64 bit dual processor)
After porting the database from SQL2000 to SQL2005 (no changes) running the same update statement from Management Studio on the 2003 Server and and Query analiser on the 2000 Server.
SQL2000 completes the command in 2 minutes SQL2005 is still running after 60 minutes.
SQL2000 is the live/production system with users connected, the SQL2005 is in a test environment with no other processors running.
When the problem first showed up the SQL2005 activity monitor displayed CXPACKET wait type on 2 processes with the same pid number. I now no longer have any wait type being displayed but my wait time is increasing rapidly. No block is reported.
I assume that I have an CXPACKET lock problem.
Am I correct that I have a CXPACKET problem and if so what is the resolution?
The update statement is as follows...
update BI_LENDING_TRANSACTIONS
set [Balance Movement Month] = M.[Balance Movement Month]
from BI_LENDING_TRANSACTIONS as T,
BI_BALANCE_MOVEMENT_DATES as M,
BI_COMPANIES as C
where (T.[Transaction Date] >=
(SELECT DATEADD(d, - 70, minDate) from (select min([Transaction Date]) minDate
from p_BI_LENDING_TRANSACTIONS) t1)
OR
T.[Transaction Date] >= C.[MostRecentSnapShotDate] or
T.[Value Date] = T.[Balance Movement Month] ) and
T.[Value Date] <= C.[MostRecentSnapShotDate] and
T.[Value Date] >= T.[Transaction Date] and
T.[Company_Code] = M.[Company_Code] and
T.[Value Date] > M.[SnapShotFromDate] and
T.[Value Date] <= M.[SnapShotToDate] and
C.[Company_Code] = M.[Company_Code]
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I have installed performance dashboard on 2 different servers. The first server have User Session CPU Time 71% and Wait Time =28%, The other server have Cpu Time of 20% and Wait Time of 79%. Have I understand that stands in SQL Server Waits And Queues that I have some typ of wait problem in my second server?
Then I tries to run this
Select
'%signal waits' = cast(100.0 * sum(signal_wait_time_ms) / sum (wait_time_ms) as numeric(20,2)),
'%resource waits'= cast(100.0 * sum(wait_time_ms - signal_wait_time_ms) / sum (wait_time_ms) as numeric(20,2))
From sys.dm_os_wait_stats
First Server
%signal waits %resource waits
--------------------------------------- ----------------------------
0.07 99.93
Second Server
%signal waits %resource waits
--------------------------------------- ----------------------------
0.12 99.88
Messy in my head€¦ Help please
My second server have
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My first server have
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