Causes For Latch Wait Time

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: 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;

program_name=DatabaseMail90 - Id<3780>

Any assistance is greatly appreciated.

Thank You


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Latch Time

Hi All,

This might be a bit of a question like "how long is a peice of string" however here goes.....

What is considered to be a high average latch time?

We have a SQL2000 machine which has:
700-900 ms average latch time
100% Buffer Cache Hit Ratio
No memory pages / second
Very low (almost always below 5%) cpu usage
Next to no disk transfers / sec
0 average lock time

I am surprised that the latch time is so high. Any ideas, whether I should be looking at something in particular?

Cheers in advance.

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WARNING: EC 259683c0, 0 Waited 32100 Sec. On Latch 807133b0. Not A BUF Latch.

During a bulk insert I am receiving this error message in the sql log. It appears to have caused the server to reboot the other night..

I am running SQL 2000 8.00.760 (Service Pack 3)

2004-04-07 12:57:52.82 spid8 WARNING: EC 259683c0, 0 waited 32100 sec. on latch 807133b0. Not a BUF latch.
2004-04-07 12:57:52.82 spid8 Waiting for type 0x4, current count 0xa, current owning EC 0x70899570.

Any ideas???



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Hi Guys,

One of your SQLSERVER 7, Server throws the below error message into the log file. It won't go away until the server get rebooted. When this error start showing up.. customers have hard time connecting to the Server, eventually we have to reboot the server.

Time out occurred while waiting for buffer latch type 1, bp 0x18b9200, page (1:50859), stat 0xb, object ID 17:1954106002:1, waittime 500. Continuing to wait.

Any help is greatly appericated.


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Server: Msg 8966, Level 16, State 1, Line 2
Could not read and latch page (1:1370) with latch type SH. sysindexes failed.
DBCC execution completed. If DBCC printed error messages, contact your system administrator.

Please could you tell me how to fix it, and how it occurred in the first place?


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What does this mean any reason and fix for it..?


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Hi DBAs,

just wondering what are the values on your SQL servers for these counters:

Average latch wait time (ms)
Latch Waits/sec

We set up two servers, both are quad machines (4 cpus) with SANs devices as a HD space (RAID5) that operate via fiberchanels (can't be faster).
Both server have 4 Gb of RAM. Both have SQL2000 Ent and Win2000 Advance Server. The only difference between them is that the first one is clustered the second one is not, so.

The clastered Server has values:

Average Latch Wait time - 2782.285
Latch Waits/sec - 62.065

The non clastered Server has:

Average Latch Wait time - 550.108
Latch Waits/sec - 21

There are two similar databases located on them and the same application (two separate instalations) with a similar load utilizes the DB.

I wounder whe could be a reason for such a different values?


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I have been looking at Books Online and I'm trying to figure out how I can resolve this error.

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we''re currently performing a dry run of migrating some large (100GB+) SQL Server 2000 databases from a SQL 2000 cluster onto a new 2005 mirrorred database pair. The new configuration has completely separate database servers and a new dedicated SAN.

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We are currently investigating the SAN hardware logs to determine if this might be a physical issue as it would seem to indicate, however has anyone any experience of this or insight into what may cause this error?

Thanks in advance!

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System table pre-checks: Object ID 4. Could not read and latch page (1:403) with latch type SH. Check statement terminated due to unrepairable error.

So bad news on that one. There are no backup available that I know off, so all bets are off on that part of the recovery process.

The "good news" part of the problem, is that it is possible to extract some data out of the table, before SQL server 2005 returns the error. So what I want to do, is get every bit out I can, doing it somehow automatically, so I don't have to run bcp on 180 tables :).

Presumeably, this is quite possible, but how?

NB. If I do a complete basic SELECT * FROM tbl1, it returns data, then errors out, but what about the data after the last row SELECT returns? Is it possible, that there might be data in the table that are recoverable after the 'broken row(s)'?

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In my workflow I will be waiting for the CRV.DONE indicator file and once it is avaiable I will start loading the and once the load is completed I will delete CRV.DONE file and be ready for the next day load.

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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?

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Then I tries to run this

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From sys.dm_os_wait_stats

First Server
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--------------------------------------- ----------------------------
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Second Server
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--------------------------------------- ----------------------------
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Messy in my head€¦ Help please

My second server have

CLR with 50% in the historial wait. Rest in Sleep

My first server have
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