SQL Server AlwaysOn Failover threshold and Lease Timeout

Hi experts,
I found each time when I were building/restoring another log shipping(standby) server. It would cause ERR [RES] SQL Server Availability Group: [hadrag] Failure detected, diagnostics heartbeat is lost(in cluster log) and A connection timeout has occurred on a previously established connection to availability replica 'DL980-4' with id(in errorlog). I google and find a document (http://download.microsoft.com/download/0/F/B/0FBFAA46-2BFD-478F-8E56-7BF3C672DF9D/Troubleshooting%20SQL%20Server%20AlwaysOn.pdf ) indicated that “This may be a performance issue”. I run restore database and AlwaysOn synchronizing on the same 10GbE link at the same time.
Should I increase
leaseTimeout from 20000 to 100000 and
HealthCheckTimeout from 30000 to 300000?
Does it work to prevent unnecessary failover.
Please refer to
(http://blogs.msdn.com/b/psssql/archive/2012/09/07/how-it-works-sql-server-alwayson-lease-timeout.aspx )
parag
10-18-2013 3:19 AM
Hi Denzil
we seem to see lease expires very frequently when the server is under very high cpu pressure .. our failure condition level is 1
is it possible to prevent this situation . the problem is when lease expires,all the current connections seem to be dropped . wondering if there is a way to prevent this ..
Also is it possible to affitinize the always on health check process to a particular core
Thanks for your help!

Hi Dennis
Should I increase
leaseTimeout from 20000 to 100000 and
HealthCheckTimeout from 30000 to 300000?
Does it work to prevent unnecessary failover.
1. you can increase the timeout parameter, but when the fail-over time slight delay will be there (its a work around solution)
2. You may require to check the Network connections. (Cluster Heartbeat & public network)
3. Have you update the latest patches of OS & DB?
4. If possible raise the ticket to Microsoft. they may give some update for Cluster resource update based on your issue
Regards
Sriram

Similar Messages

Alter IP address of SQL Server AlwaysOn Failover clustering Iistener

Hi,
Is there a possibility to change the IP address of SQL Server AlwaysOn Failover clustering Listener IP address without deleting the exiting one and also retaining the same DNS name.
NOTE: Only the IP address needs to be altered rest all (DNS, port) should remain the same.
Regards
Vijay

Hi Karthikkk,
As your description, you want to modify the listener IP address in AlwaysOn availability group without changing other settings including DNS and port. To achieve this, you could modify a listener IP address on primary replica using the following statement:
ALTER AVAILABILITY GROUP group_name
MODIFY LISTENER ‘dns_name’
ADD IP { (‘four_part_ipv4_address’, ‘four_part_ipv4_mask’) | (‘dns_nameipv6_address’) }
For more information about the process, please refer to the article:
http://msdn.microsoft.com/en-us/library/ff878601.aspx
Regards,
Michelle Li

SharePoint 2013 and SQL Server AlwaysOn - HA

Hi guys,
Please help!
I need to setup SP13 server on SQL 2012 AlwaysOn (on sql01 and sql02). The HA AlwaysOn group already configured by DB team on these 2 replica with and called SP_AOAG alias
My question is can I use this alias to setup SharePoint or I need to configure the HA AlwaysOn group for SgharePoint as suggested in the article below:
http://blogs.msdn.com/b/sambetts/archive/2013/04/24/sharepoint-2013-and-sql-server-alwayson-high-availability-sharepoint.aspx
Any advice greatly appreciated .
BalaiP

You do not want to use a SQL Alias with an AG Listener. Just point SharePoint straight at the AG Listener. You will need to manually add any accounts to non-primary instances. You do not need to add them to individual databases, of course. You will also
need to manually set MAXDOP to 1 on non-primary instances.
Trevor Seward
Follow or contact me at...
&nbsp&nbsp
This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

Install Guide - SQL Server 2014, Failover Cluster, Windows 2012 R2 Server Core

I am looking for anyone who has a guide with notes about an installation of a two node, multi subnet failover cluster for SQL Server 2014 on Server Core edition

Hi KamarasJaranger,
According to your description, you want configure a SQL Server 2014 Multi-Subnet failover Cluster on Windows Server 2012 R2. Below are the whole steps for the configuration. For the detailed steps about the configuration, please download
and refer to the
PDF file.
1.Add Required Windows Features (.NET Framework 3.5 Features, Failover Clustering and Multipath I/O).
2.Discover target portals.
3.Connect targets and configuring Multipathing.
4.Initialize and format the Disks.
5.Verify the Storage Replication Process.
6.Run the Failover Cluster Validation Wizard.
7.Create the Windows Server 2012 R2 Multi-Subnet Cluster.
8.Tune Cluster Heartbeat Settings.
9.Install SQL Server 2014 on a Multi-Subnet Failover Cluster.
10.Add a Node on a SQL Server 2014 Multi-Subnet Cluster.
11.Tune the SQL Server 2014 Failover Clustered Instance DNS Settings.
12.Test application connectivity.
Regards,
Michelle Li

Microsoft SQL Server JDBC Drivers 4.0.2206 timeout on first connection to SQL Server Express after it sleeps

Our builds kick off and run integration tests. They are configured to hit a SQL Server Express server.
If the builds have been quiet for a while, the first test to connect fails after stalling for 20 minutes.
Subsequent tests are fine.
Reversing test order does the same thing, with a different test.
We noticed in the SQL Server express log the server saying it is waking up after being idle.
Microsoft SQL Server Express with Microsoft SQL Server JDBC Drivers 4.0.2206.
Connection times out after 20 minutes.Occurs with the first connection made after the SQL Server Express server wakes up from going to sleep.Connections after the first are just fine, until SQL Server Express sleeps.SSL enabled. Timeout duration for the connection failure is unaffected by setting timeout options for the connection. Work around:
cron-like job that runs every minute that makes a simple query on the server keeps the server from going to sleep.
Has anyone else run into this?

Hello,
SQL Server Express will go to sleep if idle, this behavior is not configurable.
When SQL Express transitions from idle to active some of the memory that was released needs to be reclaimed; this results is a slight lag during "startup time" when you're first connecting to SQL Express.
The other sort of sleep occurs when a database with AUTO_CLOSE unloading itself after a period of inactivity. This can be resolved by setting AUTO_CLOSE to false.
You can refer to the following blog about more details about this:
http://blogs.msdn.com/b/sqlexpress/archive/2008/02/22/sql-express-behaviors-idle-time-resources-usage-auto-close-and-user-instances.aspx
You can try to upgrade the SQL Server Express to a non-free version to get rid of this.
Regards,
Fanny Liu
Fanny Liu
TechNet Community Support

SQL Server 2012 Failover Cluster configuration questions

Hi,
I have few questions on , SQL Server 2012 Failover cluserting pleasse provide suggestions:
1) In SQL Server 2012 is there a configuration for active / passive Failover Cluster installation? If so how is it done? if you could provide any links or articles that would help.
OR
Is this been replaced by Always ON Availability Groups?
2) Also in our environment we have done active/active installation but at a time my understanding is only node has the ownership to the shared storage versus both the nodes, is that correct? If not please provide an explanation?
Any additional information would be valuable in clearing my doubts?
Thank youy
Malini=

Hi malinisethi,
If you install SQL Server in a cluster and configure Active-Passive cluster. In the first node, select “New SQL Server Failover Cluster installation” option , when we are installing Active-Passive cluster, we have to specify one virtual/network name. (Note:
For Active-Active clustering you have specify different network names as per the number of nodes). on the other nodes is similar to installing on the first node except that we have select the Add Node to a SQL Server failover cluster option from the initial
menu. For more information, there is a similar issue about SQL Server 2008 Active-Passive/Active-Active cluster installation, you can review the following article.
http://sqldbpool.com/2009/10/07/sql-server-2008-active-passive-cluster-installation/
About Active/Active SQL Cluster, two clustered SQL Server instance are created in different nodes. Then apply Active /Active configuration of both instance. There is an example about creating an Active/Active SQL Cluster using Hyper-V. you can review the
following article.
http://blogs.msdn.com/b/momalek/archive/2012/04/11/creating-an-active-active-sql-cluster-using-hyper-v-part2-the-clustered-instances.aspx
Regards,
Sofiya Li
Sofiya Li
TechNet Community Support

SQL Server 2005 High Availability and Disaster Recovery options

Hi, We are are working on a High Availability & Disaster Recovery Planning solution for an application database which is on SQL Server 2005. What different options have we got to implement this for SQL Server 2005 and after we have everything setup how
do we test the failover is working?
Thanks in advance.........
Ione

DR : Disaster recovery is the best option for the business to minimize their data loss and downtime. The SQL server has a number of native options. But, everything is depends upon your recovery time objective RTO and recovery point objective RPO.
1. Data center disaster
Geo Clustering
2. Server(Host)/Drive (Except shared drive) disaster
Clustering
3. Database/Drive disaster
Database mirroring
Log shipping
Replication
Log shipping
Log shipping is the process of automating the full database backup and transaction log on a production server and then automatically restores them on to the secondary (standby) server.
Log shipping will work either Full or Bulk logged recovery model.
You can also configure log shipping in the single SQL instance.
The Stand by database can be either restoring or read only (standby).
The manual fail over is required to bring the database online.
Some data can be lost (15 minutes).
Peer-to-Peer Transactional Replication
Peer-to-peer transactional replication is designed for applications that might read or might modify the data in any database that participates in replication. Additionally, if any servers that host the databases are unavailable, you can modify the application
to route traffic to the remaining servers. The remaining servers contain same copies of the data.
Clustering
Clustering is a combination of one or more servers it will automatically allow one physical server to take over the tasks of another physical server that has failed. Its not a real disaster recovery solution because if the shared drive unavailable we cannot
bring the database to online.
Clustering is best option it provides a minimum downtime (like 5 minutes) and data loss in case any data center (Geo) or server failure.
Clustering needs extra hardware/server and it’s more expensive.
Database mirroring
Database mirroring introduced in 2005 onwards. Database Mirroring maintain an exact copy of a database on a different server. It has automatic fail over option and mainly helps to increase the database availability too.
Database mirroring only works FULL recovery model.
This needs two instances.
Mirror database always in restoring state.
http://msdn.microsoft.com/en-us/library/ms151196%28v=sql.90%29.aspx
http://blogs.technet.com/b/wbaer/archive/2008/04/19/high-availability-and-disaster-recovery-with-microsoft-sql-server-2005-database-mirroring-and-microsoft-sql-server-2005-log-shipping-for-microsoft-sharepoint-products-and-technologies.aspx
http://www.slideshare.net/rajib_kundu/disaster-recovery-in-sql-server
HADR Considerations
Need to Understand the business motivations and regulatory requirements that are driving the customer's HA/DR requirements. Understand how your customer categorizes the workload from an HA/DR perspective. There is likely to be an alignment between the needs
and categorization.
Check for both the recovery time objective (RTO) and the recovery point objective (RPO) for different workload categories, for both a failure within a data center (local high availability) and a total data center failure (disaster recovery). While RPO and
RTO vary for different workloads because of business, cost, or technological considerations, customers may prefer a single technical solution for ease in operations. However, a single technical solution may require trade-offs that need to be discussed with
customers so that their expectations are set appropriately.
Check and understand if there is an organizational preference for a particular HA/DR technology. Customers may have a preference because of previous experiences, established operational procedures, or simply the desire for uniformity across databases from
different vendors. Understand the motives behind a preference: A customers' preference for HA/DR may not be because of the functions and features of the HA/DR technology. For example, a customer may decide to adopt a third-party solution for DR to maintain
a single operational procedure. For this reason, using HA/DR technology provided by a SAN vendor (such as EMC SRDF) is a popular approach.
To design and adopt an HA/DR solution it is also important to understand the implications of applying maintenance to both hardware and software (including Windows security patching). Database mirroring is often adopted to minimize the service disruption
to achieve this objective.
HADR Options :
Failover clustering for HA and database mirroring for DR.
Synchronous database mirroring for HA/DR and log shipping for additional DR.
Geo-cluster for HA/DR and log shipping for additional DR.
Failover clustering for HA and storage area network (SAN)-based replication for DR.
Peer-to-peer replication for HA and DR (and reporting).
Backup & Restore ( DR)
keep your server DB backups in network location ( DR)
Always keep your sql server 2005 upto date, in case if you are not getting any official support from MS then you have to take care of any critical issues and more..
Raju Rasagounder Sr MSSQL DBA

[Microsoft][SQL Server Native Client 11.0][SQL Server]The text, ntext, and image data types cannot be compared or sorted, except when using IS NULL or LIKE operator. 'Items' (OITM) (OITM)

Dear Experts,
i am getting the below error when i was giving * (Star) to view all the items in DB
[Microsoft][SQL Server Native Client 11.0][SQL Server]The text, ntext, and image data types cannot be compared or sorted, except when using IS NULL or LIKE operator. 'Items' (OITM) (OITM)
As i was searching individually it is working fine
can any one help me how to find this..
Regards,
Meghanath.S

Dear Nithi Anandham,
i am not having any query while finding all the items in item master data i am giving find mode and in item code i was trying to type *(Star) and enter while typing enter the above issue i was facing..
Regards,
Meghanath

SQL Server Express 2008 R2 and Windows 8.1 (Standard)

I recently re-engineered the backend of a legacy Access 2003 application because we knew that going forward we were going to loose the replication capability in Access. This is a small, departmental app, so the new SQL Server Express 2008 R2 backend is
hosted on a robust Windows 7 system. I tested the implementation with both Windows XP and Windows 7 clients running the updated Access 2003 frontend and everything worked great.
We are now in the midst of a company-wide upgrade to Windows 8.1 and I'm having issues. The legacy frontend works fine with Access 2013 (full version) when run locally on the Win7 machine, but I can't get any of the new Win 8.1 clients to connect to the
SQL database using the Access 2013 Runtime module. I CAN create ODBC connections to SQL Server from the clients and they test successfully, so I think I have a valid SQL connection to the Win 7 box.
To recap: old clients were WinXP Pro with Office 2003 Pro, new clients are Win 8.1 (non-Pro) with Access 2013 Runtime module.
Any ideas?

Hi ,
Glad to hear that you have found the solution. Thank you for coming back and let us know the result:)
Best Regards,
Tracy
Tracy Cai
TechNet Community Support

Linked Server error: Login Failed for user 'NT AUTHORITY\ANONYMOUS LOGON' between sql server 2005 32 bit and sql server 2012 64 bit

Hi All,
Here the linked server is created between sql server 2012 64 bit and sql server 2005 32 bit. I am getting the below error when i try to access linked server from third server. I have created linked from Instance 1 to Instance 2. When i access it from
instance 3 i am getting the below error. SPN setting has been done between these 2 servers. Also the option 'Trust the delegate' is enabled for the both the service account.
'Login Failed for user 'NT AUTHORITY\ANONYMOUS LOGON'
Appreciate your quick response.
Vikas.M.S

Hello,
Please read the following resources:
http://www.databasejournal.com/features/mssql/article.php/3696506/Setting-Up-Delegation-for-Linked-Servers.htm
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/ea26de43-4c6b-4991-86d7-e1578f107c92/linked-server-login-failed-for-user-nt-authorityanonymous-logon?forum=sqldataaccess
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com

Is Distributed Transaction Coordinator services of the application role are required by SQL Server 2012 for clustering and support of SharePoint 2013.

All I want to know is if Distributed Transaction Coordinator services of the application role are required by SQL Server 2012 for clustering and support of SharePoint 2013.
I have been planning and deploying my companies first Windows Server 2012/SQL Server 2012 Always On cluster and Always On Availability Groups Multi-Subnet cluster and instances for SharePoint 2013, and I will be brutally honest, the documentation on either
the MSDN and TechNet leave alot to be desired. Continually finding links in the documentation will take me from a Windows 2012 reference to a page talking about Windows Server 2008 or R2, The differences of which there are so many when it comes to configurations,
settings, roles, services when working with SQL Server 2012. I have been confused, frustrated, screaming mad, with all the misdirection in this documentation. The documentation takes me windows 2008 R2 which is different than 2012!
Tired and trying to pick myself up off the floor!
Greg
Gman

In general, DTC is not required for SQL 2012. But, since you are asking specifically about SharePoint, it would be better to ask in a SharePoint forum. They would be more likely to know those situations where FTC might be needed by SharePoint.
.:|:.:|:. tim

Sql server partition parent table and reference not partition child table

Hi,
I have two tables in SQL Server 2008 R2, Parent and Child Table.
Parent has date time, and it is partitioned monthly, there is a Child table which just refer the Parent table using Foreign key relation.
is there any problem the non-partitioned child table referring to a partitioned parent table?
Thanks,
Areef

The tables will need to be offline for the operation. "Offline" here, means that you wrap the entire operation in a transaction. Ideally, this transaction would:
1) Drop the foreign key.
2) Use ALTER TABLE SWITCH to drop the old data.
3) Use ALTER PARTITION FUNCTION to drop the old empty partition.
4) Use ALTER PARTITION FUNCTION to add a new empty partition.
5) Reapply the foreign keys WITH CHECK.
All but the last operation are metadata-only operation (provided that you do them right). To perform the last operation, SQL Server must scan the child tbale and verify that all keys are present in the parent table. This can take some time for larger tables.
During the transaction, SQL Server holds Sch-M locks on the table, which means that are entirely inaccessible, even for queries running with NOLOCK.
You avoid this the scan by applying the fkey constraint WITH NOCHECK, but this can have impact on query plans, as SQL Server will not consider the constraint as trusted.
An alternative which should not be entirely dismissed is to use partitioned
views instead. With partitioned views, the foreign keys are not an issue, because each partition is a pair of tables, with its own local fkey.
As for the second question: it appears to be completely pointless to partition the parent, but not the child table. Or does the child table only have rows for a smaller set of the rows in the parent?
Erland Sommarskog, SQL Server MVP, [email protected]

Oracle equivalent of SQL Server's "FOR XML" and "OPENXML"

Hi
Can someone please tell what are the Oracle's equivalent of SQL Server's "FOR XML" and "OPENXML" features?

Probably you can try General XML forum General XML
Gints Plivna
http://www.gplivna.eu

Can i use sql server express 2008, 2012, and 2014 for commercial purpose?

Good day,
I saw that the sql server express 2005 can be used for commercial purpose without buying additional license
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/8df18025-fc2b-43c2-8476-532336ff09e3/sql-server-express-for-commercial-use?forum=sqlexpress
the question is can I do the same for sql server express 2008,2012, and 2014?
can I install and use sql server express 2008, 2012 and 2014 on an azure vm? specifically
http://azure.microsoft.com/en-us/pricing/details/virtual-machines/
A0 instance
just an off topic question, is it required to pay to use sql server on virtual machines?
why is there a different pricing here
http://azure.microsoft.com/en-us/pricing/details/virtual-machines/#Sql

Hello,
Yes, you can use all versions SQL Server Express for commercial use. Please read more resources about it.
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/01dbc5c3-b5fe-42d4-9eb9-91683cf8285b/can-any-commercial-application-that-uses-sql-server-express-freely-redistribute-the-sql-server?forum=sqlexpress
https://social.technet.microsoft.com/Forums/en-US/661ebf2e-ff2f-4dae-a8ae-e2179a764c09/sql-server-2012-express-in-commercial-product?forum=sqlexpress
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com

SQL Server 2005 64 bit and Oracle 9

Hi,
I have a situation which involves SQL Server 2005 64 bit and Oracle 9 32 bit,
I have a requirement that involves creating Stored Procedures from Oracle 9 which will call tables from SQL Server 2005 64 bit, with operations involving 'Select' 'Insert' 'Update' and 'Delete'.
it works fins, except when attempting to search for an SQL Server 'varchar' value, wher no mapping is done
though the Oracle sees the field as 'varchar2'
can anyone please advice on this
thanks
Basel

I think you're somehow not getting a resuklt because you're query doesn't return any data.
Why the fiealdA=pat=parameterA construct? Wouldn't it just work if you changed it to fieldA=parameterA?
Also, can you not just define parameterA as a varchar to make them match?
What if you do "select * from (<your query without where>) a where a.fieldA = :parameterA"
While not efficient, it would make the filtering occur in Oracle and maybe that will let you see the problem in native Oracle land and then reuse the solution in your orginal query. If that doesn't work, drop the where clause and inspect the data closly and hardcode a simple where without using PL*SQL or bind variables.

SQL Server AlwaysOn Failover threshold and Lease Timeout

Similar Messages

Maybe you are looking for