I keep getting an alert from a Third-Party Tool stating my server is reporting failed components with the following message
Components Reporting Problems:
Average Lock Wait Time(ms)(Critical)
When I look at sp_who2 or sp_lock I don't see anything blocking processes or anything else out of the ordinary.
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
Hello all,I've got a query which suddently became very slow. It now takes about 10secs instead of 2 secs.I've got to identical DB (one is for test and the other is production). Thequery 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 serverreplies.In test DB, I get the value: 2200And in production DB: 1.22344e+009What does this mean concretly? What do I have to do to solve this problem?TIA.YannickPS I'm using SS2000 SP3 on NT4.0
View 4 Replies View RelatedI am currently investigating aa high avg write time ms issue (145ms) which seems to be only occuring on the tempdb data files.I have followed the recommended setup of TEMPDB in that
1. Data files = number of physical cores
2. Data files and logfiles are on separate partitions away from the other databases.
3. Tempdb is presized and no incremental file increases look like they are happening with frequency.
We have sharepoint 2012 setup on other sql servers and with TEMPDB setup following the same guidelines, with far more Sharepoint activity on a similary specified hardware which is why its confusing.FileIO auditing on the partitions themselves shows that the FileIO is very fast on the partitions that the tempdb data file which leads me to beleive that Sharepoint may be the culprit perhaps due to excess use of tempdb with operations taking a long time to resolve.
My table has two datetime columns (TheatreArivalDate and TheatreDepartDate). Can I get an average value of the time differences of them? Thanks
View 1 Replies View RelatedI have the following code which returns day of week name, position and date and time of surgeries.
SELECT
DATENAME(WEEKDAY,OPE_START_TIME) AS DOW,
[OPE_ORDER_IN_SESS_ASC] AS POSITION,
OPE_START_TIME AS [TIME]
FROM table1The data looks like thisHow can i group this data so I get the average start time by day of week and position?
Hi everyone, I need some help with creating a report that calculates the average turnaround time in days that it takes for units to return from trips destined to a location.
The database that I am working with lists a trip each time a unit is dispatched to a destination, and then another trip is created for the units return. In the example below I am trying to calculate the number of days that it takes for a unit to return to Vancouver by calculating the difference between the departure date from Vancouver and the arrival date back into Vancouver. I then need to calculate the average number of days that it takes for a unit to return from a trip. See sample data below.
UNIT -- TRIP -- START LOCATION --START DATE--FIN LOCATION--FIN DATE
================================================== =======
U12 ----001 --- VANCOUVER -------FEB 10 ------ ONTARIO ----- FEB 15
U10 ----002 --- VANCOUVER -------FEB 13 ------ ONTARIO ----- FEB 18
U12 ----003 --- ONTARIO ----------MARCH 13 --- VANCOUVER -- MARCH 18
U10 ----004 --- ONTARIO ----------MARCH 1 ---- VANCOUVER ---MARCH 6
Unit U12 took 36 days to return back to Vancouver
Unit U10 took 21 days to return back to Vancouver
Therefore based on the two trips it takes an average of aproximately 28.5 days for a unit to return from trips destined to Ontario.
Hello~,
The table has columns like this.
________________________________
time smalldatetime
value1 int
value2 int
----------------------------------------------------------
for example,
....
'2006-11-16 12:00:00',100,200
'2006-11-16 13:00:00',110,210
'2006-11-16 14:00:00',120,220
....
The record is inserted at every hour.
I want get daily,monthly,yearly average and display the result ordered by time.
I am trying to figure out how to calculate the average time between phone calls for a user. The initial requirement is to calcualte this on all calls for an entire month but I would guess that would lead to other periods as well, such as daily, weekly, etc. One hurdle is what to do when going from one day to the next. I could possibly just week out any times between calls that are greater than a certain amount of time to address that.
Any way, here is a small sample of what I'll be dealing with. Any ideas on how to approach this or get it to work would be greatly appreciated.
Code Block
CREATE TABLE #avetime (origdate datetime, duration_seconds int, duration_minutes decimal(9,2), phoneuser varchar(20), calltype varchar(15))
INSERT into #avetime VALUES ('Jan 7 2008 9:19AM', 21, 0.4, 'Coleman', 'Long Distance')
INSERT into #avetime VALUES ('Jan 7 2008 9:19AM', 48, 0.8, 'Coleman', 'Long Distance')
INSERT into #avetime VALUES ('Jan 7 2008 9:33AM', 81, 1.4, 'Coleman', 'Long Distance')
INSERT into #avetime VALUES ('Jan 7 2008 9:35AM', 87, 1.5, 'Coleman', 'Internal')
INSERT into #avetime VALUES ('Jan 7 2008 9:37AM', 27, 0.5, 'Coleman', 'Internal')
INSERT into #avetime VALUES ('Jan 7 2008 9:42AM', 13, 0.2, 'Coleman', 'Long Distance')
INSERT into #avetime VALUES ('Jan 7 2008 9:43AM', 84, 1.6, 'Coleman', 'Long Distance')
INSERT into #avetime VALUES ('Jan 7 2008 12:00PM', 914, 15.2, 'Coleman', 'Long Distance')
INSERT into #avetime VALUES ('Jan 7 2008 2:24PM', 3, 0.1, 'Coleman', 'Internal')
INSERT into #avetime VALUES ('Jan 8 2008 10:13AM', 21, 0.4, 'Coleman', 'Long Distance')
INSERT into #avetime VALUES ('Jan 8 2008 10:33AM', 482, 8.0, 'Coleman', 'Long Distance')
INSERT into #avetime VALUES ('Jan 8 2008 11:49AM', 56, 0.9, 'Coleman', 'Long Distance')
I am running into a barrier and need to understand the average length of time that a fully optimized data cube should take to process.
We are currently running an average of 15 to 20 minutes per cube, with average of 2000 aggregations, 25% performance increase, and approximately 2 million rows, with around 40 dimensions and 30 measures.
I personally think this is a pretty good time to process. However, I am being challenged to reduce this time frame. In theroy I can't possibly see it getting below where we currently are. SO I am reaching out to the group of guru's...
What is your average length of time to process your Data Cubes? Please respond to me at ken.kolk@medcor.com I would greatly appreciate it and need the averages from the field.
I have a dataset as such:
Student TestTypeDate TestCnt
111-22-1111English2015-09-01 10:00:00 1
111-22-1111Math2015-09-02 11:00:00 2
111-22-1111Geo2015-09-03 12:00:00 3
222-11-2222English2015-09-01 10:00:00 1
333-22-1111English2015-09-01 10:00:00 1
[Code] ...
So some have just 1 test and some have multiple. I have a count for each. What I need to do is use that count and get an average time between each test per student.
Hi,
while my db is executing a store procedure i try to view the current activity in the managent but it returns to me 'Lock request time out period exceded'. It happens until the store procedure is finished. After that everything is ok. However i can see the activity executing sp_who and the db seems to work ok, maybe a little slow.
what does it means????
Sorry for my english.
Thanks. Eduardo
Hi
I am getting occasional errors in the event log of our production database where we have some service broker receiving queues running.
The first error is
Lock request time out period exceeded
This is then immediately followed by
An error occurred in dialog transmission: Error: 1222, State: 51.
There are no further errors and everything seems to carry on OK after this error.
Does anybody know what the problem may be?
Anthony
Hi All,
We recently bought a new (sql) database server with 8 gb ram. I started moving the databases from our older 2005-sql to the new one. Everything goes well, except...
Some steps in our jobs do a truncate table of a delete from... When the job is running and it reaches the step where the truncation/deleting starts, it stops its execution and gives the following error :
Code Snippet
The instance of the SQL Server Database Engine cannot obtain a LOCK resource at this time. Rerun your statement when there are fewer active users. Ask the database administrator to check the lock and memory configuration for this instance, or to check for long-running transactions. [SQLSTATE HY000] (Error 1204). The step failed.
When I try to execute the procedure that does the truncation manually, it works perfect. Do you guys have an idea on what the cause of this error might be ?
Thanks a lot in advance !
(FYI: we use the enterprise edition of sql server 2005)
Grtz, Koen
Hi ,
i am getting error Lock request time-out period exceeded frequently
Could any one explain how can i track the Locking transactions
SP_who,SP_lock helps me partially but i need clear solution
I have a query which is part of bigger transaction:
;WITH CTE(
SELECT id, q,
totalQ=SUM(q) OVER (ORDER BY id ROWS UNBOUNDED PRECEDING)
FROM dbo.myTable WITH (UPDLOCK, ROWLOCK)
), CTE1 AS(
SELECT id, q_take=CASE WHEN c.Total<@qRequired THEN c.q ELSE
@qRequired-c.Total+c.q END FROM CTE
WHERE (CASE WHEN c.Total<@qRequired THEN c.q ELSE
@qRequired-c.Total+c.q END)>0
)
UPDATE t set q-=c1.q_take FROM dbo.myTable t INNER JOIN CTE1 c1 ON t.id=c1.id
Because CTE query is executed separately of update query I must put UPDLOCK hint, otherwise myTable could be changed while my query executes by some other user.(I have snapshot row committed transaction).
The problem is that my hint will hold lock on rows of myTable until the end of outer transaction(the bigger one).
But I need lock only for the time of this small query execution. What would be the best way to achieve that?
Hello:I run one process that calls the following the store procedure andworks fine.create PROCEDURE sp_GetHostSequenceNumASBEGINSELECT int_parameter_dbf + 1FROM system_parameter_dbtWHERE parameter_name_dbf = 'seqNum'UPDATE system_parameter_dbtSET int_parameter_dbf = int_parameter_dbf + 1WHERE parameter_name_dbf = 'seqNum'ENDGOIf I run two processes that call the above store procedure, I mightoccasionally get the dirty data of int_parameter_dbt. I guess that iscaused by two processes accessing to the same resource simultaneously.Is there any way to lock the store procedure call from MSSQL Serverand allow only one process to access it at a time?Thanks for help.Best Jin
View 2 Replies View RelatedWe're running a SQL-Server 2012 and for a while now my accessing records from bigger tables became tricky.There is a Tomcat-8 running which sometimes can't access these tables at all or only after a long delay. As this happened first I went to the Server-Room and opened the Database with the Management Studio to see if there were any issues. open the Database but expanding the directories for "Tables" or "Views" failed after 10 Seconds with the Error 1222.
I turned the Tomcat-8 off to find out whether some unclosed connections are open. Same result, no changes even after one hour.Another 3rd-Party program which we are using seems to connect via other mechanisms to the SQL-Server (Is there a way to list current connections and their types in the Management-Studio, I'm under the impression this program does a lot of caching, it's much faster than the Management-Studio itself.The question is now how can I find out why these time-outs happen? I'm not an expert in SQL-Servers so.
What is this? How do I fix it? I get a ton of these and it slows down the server for 5 minutes.
An error occurred in Service Broker internal activation while trying to scan the user queue 'msdb.dbo.ExternalMailQueue' for its status. Error: 1222, State: 51. Lock request time out period exceeded. This is an informational message only. No user action is required.
We recently implemented merge replication.We were expereincing. The replication is between 2 SQL Servers (2005) over same network box, and since we have introduced the replication, the performance has degraded considerably on subscriber end.
1) One thing that should be mention is that its a "unidirectional Direction" flow of changes is from publisher towards subscriber (only one publisher and distributor as well and one subscriber ).
2) Updates are high than inserts and only one article let say "Article1" ave update up to 2000 per day and i am experiecing that dbo.MSmerge_upd_sp_Article1_GUID taking more cpu time.what should be do..
on subscriber database response time is going to slow and i am experiencing a lot of number of LOCK time outs on application end.
can any one can also suggest me server level settings for aviding locking time out.
looking for any experieced solution/suggestion.
Thanks in advance.
Calculation of an average using DAX' AVERAGE and AVERAGEX.This is the manual calculation in DW, using SQL.In the tabular project (we're i've noticed that these 4 %'s are in itself strange), in a 1st moment i've noticed that i would have to divide by 100 to get the same values as in the DW, so i've used AVERAGEX:
Avg_AMP:=AVERAGEX('Fct Sales';'Fct Sales'[_AMP]/100)
Avg_AMPdollar:=AVERAGEX('Fct Sales';'Fct Sales'[_AMPdollar]/100)
Avg_FMP:=AVERAGEX('Fct Sales';'Fct Sales'[_FMP]/100)
Avg_FMPdollar:=AVERAGEX('Fct Sales';'Fct Sales'[_FMPdollar]/100)
The results were, respectively: 701,68; 2120,60...; -669,441; and  finally **-694,74** for Avg_FMPdollar.i can't understand the difference to SQL calculation, since calculations are similar to the other ones. After that i've tried:
test:=SUM([_FMPdollar])/countrows('Fct Sales') AND the value was EQUAL to SQL: -672,17
test2:=AVERAGE('Fct Sales'[_Frontend Margin Percent ACY]), and here, without dividing by 100 in the end, -696,74...
So, AVERAGE and AVERAGEX have a diferent behaviour from the SUM divided by COUNTROWS, and even more strange, test2 doesn't need the division by 100 to be similar to AVERAGEX result.
I even calculated the number of blanks and number of zeros on each column, could it be a difference on the denominator (so, a division by a diferente number of rows), but they are equal on each row.
I have a temp_max column and a temp_min column with data for every day for 60 years. I want the average temp for jan of yr1 through yr60, averaged...
I.E. the avg temp for Jan of yr1 is 20 and the avg temp for Jan of yr2 is 30, then the overall average is 25.
The complexity lies within calculating a daily average by month, THEN a yearly average by month, in one statement.
?confused?
Here's the original query.
accept platformId CHAR format a6 prompt 'Enter Platform Id (capital letters in ''): '
SELECT name, country_cd from weather_station where platformId=&&platformId;
SELECT to_char(datetime,'MM') as MO, max(temp_max) as max_T, round(avg((temp_max+temp_min)/2),2) as avg_T, min(temp_min) as min_temTp, count(unique(to_char(datetime, 'yyyy'))) as TOTAL_YEARS
FROM daily
WHERE platformId=&&platformId and platformId = platformId and platformId = platformId and datetime=datetime and datetime=datetime
GROUP BY to_char(datetime,'MM')
ORDER BY to_char(datetime,'MM');
with a result of:
NAME_________________CO
-------------------- --
OFFUTT AFB___________US
MO______MAX_T _____AVG_T__MIN_TEMTP_TOTAL_YEARS
-- ---------- ---------- ---------- -----------
01_________21______-5.31________-30__________60
02_________26______-2.19______-28.3__________61
03_______31.1_______3.61______-26.1__________60
04_______35.6______11.07______-12.2__________60
05_______37.2_______17.2_______-3.3__________60
06_______41.1______22.44__________5__________60
07_______43.3______24.92________7.2__________60
08_______40.6______23.71________5.6__________60
09_________40______18.84_______-2.2__________59
10_______34.4_______12.5_______-8.9__________59
11_________29_______4.13______-23.9__________60
12_________21______-2.52______-28.3__________60
I simply made my script task (or any other task) fail
In my package error handler i have a Exec SQL task - for Stored Proc
SP statement is set in following expression (works fine in design time):
"EXEC [dbo].[us_sp_Insert_STG_FEED_EVENT_LOG] @FEED_ID= " + (DT_WSTR,10) @[User::FEED_ID] + ", @FEED_EVENT_LOG_TYPE_ID = 3, @STARTED_ON = '"+(DT_WSTR,30)@[System::StartTime] +"', @ENDED_ON = NULL, @message = 'Package failed. ErrorCode: "+(DT_WSTR,10)@[System::ErrorCode]+" ErrorMsg: "+@[System::ErrorDescription]+"', @FILES_PROCESSED = '" + @[User::t_ProcessedFiles] + "', @PKG_EXECUTION_ID = '" + @[System::ExecutionInstanceGUID] + "'"
From progress:
Error: The Script returned a failure result.
Task SCR REIL Data failed
OnError - Task SQL Insert Error Msg
Error: A deadlock was detected while trying to lock variable "System::ErrorCode, System::ErrorDescription, System::ExecutionInstanceGUID, System::StartTime, User::FEED_ID, User::t_ProcessedFiles" for read access. A lock could not be acquired after 16 attempts and timed out.
Error: The expression ""EXEC [dbo].[us_sp_Insert_STG_FEED_EVENT_LOG] @FEED_ID= " + (DT_WSTR,10) @[User::FEED_ID] + ", @FEED_EVENT_LOG_TYPE_ID = 3, @STARTED_ON = '"+(DT_WSTR,30)@[System::StartTime] +"', @ENDED_ON = NULL, @message = 'Package failed. ErrorCode: "+(DT_WSTR,10)@[System::ErrorCode]+" ErrorMsg: "+@[System::ErrorDescription]+"', @FILES_PROCESSED = '" + @[User::t_ProcessedFiles] + "', @PKG_EXECUTION_ID = '" + @[System::ExecutionInstanceGUID] + "'"" on property "SqlStatementSource" cannot be evaluated. Modify the expression to be valid.
Warning: The Execution method succeeded, but the number of errors raised (4) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
And how did I get 4 errors? - I only set my script task result to failure
Hi
We are facing an acute situation in our web-application. Technology is ASP.NEt/VB.NET, SQL Server 2000.
Consider a scenario in which User 1 is clicking on a button which calls a SQL stored procedure. This procedure selects Group A of records of Database Page1.
At the same time if User 2 also clicks the same button which calls same SQL stored procedure. This procedure selects Group B of records of Database Page1.
So, its the same Page1 but different sets of records. At this moment, both the calls have shared locked on the Page1 inside the procedure.
Now, in call 1, inside the procedure after selecting Group A of records, the next statement is and update to those records. As soon as update statement executes, SQL Server throws a deadlock exception as follows :
Transaction (Process ID 78) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction
We are able to understand why its happening. Its because, Group A and Group B of records are on the same Page1. But both the users have shared lock on the Page1. So, no one gets the exclusive lock in records for update, even though, the records are different.
How can I resolve this issue? How can I get lock on wanted rows instead of entire page?
Please advice. Thanks a bunch.
Pankaj
Hi,
I have set of 2 DTS packages, one of which calls the other by forming a command-line (dtexec) using a Execute Process task.
From the parent package-> Execute Process Task->
dtsexec /F etc... /<pkg variable> = "servername"
Each of the parent and the called package have a variable: "User::DWServerSQLInstance" which is mapped to the SQL server connection manager server name property using an expression. The outer package has the above variable and so does the inner called package (which gets assigned through the command line from the outerpackage call to inner)
I "sometimes" get the following error:
OnError,I4,TESTDOMAdministrator,ACDWAggregation,{A1F8E43F-15F1-4685-8C18-6866AB31E62B},{77B2F3C7-6756-46EB-8C01-D880598FB4B3},5/22/2006 5:10:28 PM,5/22/2006 5:10:28 PM,-1073659822,0x,The variable "User::DWServerSQLInstance" is already on the read list. A variable may only be added once to either the read lock list or the write lock list.
Help would be appreciated!
I have seen other posts on this but, not able to relate the solution to my scenario.
Hi All,
I have seen a few other people have this error.
Package works fine when run from BIDS, DTExec, dtexecui. When I schedule it, It get these random errors. (See below)
The main culprit is a variable called "RecordsetFileDIR" which is set using an expression. (@[User::_ROOT] + "RecordSets\")
A number of other variables use this as part of their expression and as they all fail, pretty much everything dies.
I have installed SP1 (Not Beta) on server. Package uses config files to set the value of _ROOT.
The error does not always seem to be with this particular variable though. Always a variable that uses an expression but errors are random. Also, It will run 3 out of 10 times without a problem. I am the only person on the server at the time.
Any ideas?
Cheers,
Crispin
Error log:
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073659822,0x,The variable "User::RecordsetFileDIR" is already on the read list. A variable may only be added once to either the read lock list or the write lock list.
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073639420,0x,The expression for variable "rsHeaderFile" failed evaluation. There was an error in the expression.
OnError,,,DF_Header_Header,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636247,0x,Accessing variable "User::rsHeaderFile" failed with error code 0xC00470EA.
OnError,,,Move All Data,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636247,0x,Accessing variable "User::rsHeaderFile" failed with error code 0xC00470EA.
OnError,,,Load Open Batches and Process Files,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636247,0x,Accessing variable "User::rsHeaderFile" failed with error code 0xC00470EA.
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636247,0x,Accessing variable "User::rsHeaderFile" failed with error code 0xC00470EA.
OnError,,,DF_Header_Header,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636390,0x,The file name is not properly specified. Supply the path and name to the raw file either directly in the FileName property or by specifying a variable in the FileNameVariable property.
OnError,,,Move All Data,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636390,0x,The file name is not properly specified. Supply the path and name to the raw file either directly in the FileName property or by specifying a variable in the FileNameVariable property.
OnError,,,Load Open Batches and Process Files,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636390,0x,The file name is not properly specified. Supply the path and name to the raw file either directly in the FileName property or by specifying a variable in the FileNameVariable property.
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1071636390,0x,The file name is not properly specified. Supply the path and name to the raw file either directly in the FileName property or by specifying a variable in the FileNameVariable property.
OnError,,,DF_Header_Header,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073450901,0x,"component "rsHeader" (365)" failed validation and returned validation status "VS_ISBROKEN".
OnError,,,Move All Data,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073450901,0x,"component "rsHeader" (365)" failed validation and returned validation status "VS_ISBROKEN".
OnError,,,Load Open Batches and Process Files,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073450901,0x,"component "rsHeader" (365)" failed validation and returned validation status "VS_ISBROKEN".
OnError,,,POSBasketImport,,,10/05/2006 12:03:34,10/05/2006 12:03:34,-1073450901,0x,"component "rsHeader" (365)" failed validation and returned validation status "VS_ISBROKEN".
Hi,
I want to lock a table so others cannot lock it but able to read it inside transactions.
The coding I need is something like this: set implicit_transactions on begin transaction select * from table1 with (tablock, holdlock) update table2 set field1 = 'test' commit transaction commit transaction
I have tried the coding above, it won't prevent others from locking table1.
So, I changed the tablock to tablockx to prevent others from locking table1. But this will also prevent others from reading table1. So, how can I lock table1 so others cannot lock it but still able to read it?
Thank you for any help
I am running into problems while running a large procedure, and i think it may have something to do with a PAGEIOLATCH_SH wait problem.
My server, whose sole purpose is to run this one procedure, is doing plenty of disk i/o, and the CPU’s bouncing around, so I assume it’s working. But when I look at its process info, it seems to be sleeping a lot of the time on PAGEIOLATCH_SH. No other users are in the DB, so I'm quite confused. I don't find much info on this anywhere, so any insight would be very appreciated.
I'm new to SQL Sever 2005 and I'm trying to do what Informatica (Power Center - ETL) is trying does.
I have created a work flow and it is scheduled to run at every night 1:00 AM .The process is to load a flat file (CRV.data) into the database from a shared location.The flat file is transfered from a 3rd party and once the file transfer is complete it will create a indicator file (0 byte eg: CRV.DONE file) which indicates the CRV.data transfer is complete.
In my workflow I will be waiting for the CRV.DONE indicator file and once it is avaiable I will start loading the CRV.data and once the load is completed I will delete CRV.DONE file and be ready for the next day load.
Please let me know if there is any way in SQL Server 2005 to achieve it.Thanks
Hi. We are migrating a mainframe datacom database to SQL Server. One of our client-server applications already uses SQL Server. This application uses a middleware product to query and update the datacom database being migrated. We are considering using Service Broker to replace the middleware.
In many cases the client does not need a response provided the message is queued and will eventually get delivered. However, in some cases the client would like to wait for the message to be processed before proceeding. Is there an easy way to both submit and optionally wait for a response - with data - in a single stored procedure? If client does not want to continue to wait, is there a way to use a procedure to check for the returned message later?
We have not used Service Broker before and are doing for a "sanity" check before proceeding. We do not want to tightly couple the two databases at this time.
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
CLR with 50% in the historial wait. Rest in Sleep
My first server have
99% in sleep wait category.
I'm doing an update on a table with about 113m rows, the update-statement is fairly simple: update tab set col = null where col is not null.
The col column is mostly null.
Sysprocesses shows three rows for this statement: 1 CXPACKET (its a dual processor, 2000 box with sp3 installed), 2 PAGEIOLATCH_SH (waitresource is filled). My guess would be that the where-clause is executed in a seperate process blocking the update.
I changed the statement into update [...] set col = null; sysprocesses shows one row with PAGEIOLATCH_SH. Executing forever.
I checked other processes including those outside sqlserver but none are using the db, let alone accessing the table involved. Even restarted sqlserver to be sure there's no dead process blocking the update. Didn't help.
So I added a search condition to the where-clause, involving a clustered index in order to reduce the rowcount. The execution plan shows a 97% hit on the clustered index, but sysprocesses shows the three rows again...
So far the profiler didn't help me out either: there's a SP: CacheInsert on the update-statement... then nothing.
What should I do?
I have an ASP.NET web application that hangs on a single database UPDATE command for 5+ minutes. I can see this occur in SQL Profiler. This is a one row UPDATE statement on a small table (~600 rows). There are no JOINs or sub queries. There are no other users using the system. During this 5+ minutes, I can see the job in Enterprise Manager with a wait type of NETWORKIO. Since both IIS And SQL Server are running on the same system, the network shouldn't be an issue. Any ideas?
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