Error 1479 Severity 16 State 1 Sql 2005
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Error 17054 Severity 16 State 1 Sql Server
2008 Standard with a Hyper-V virtualised mirror on Windows 2008 R2 Datacentreand a witness running SQL Express on Windows 2008 Standard.
Error 17054 Severity 16 State 1 Sql Server 2008
All are at 10.0.5512and 64bit. I am using High Safety with automatic failover (synchronous) mirroring on37 databases. All servers have 1GB network links and are 1ms away from each other. Since early January,
Sql Backup Error 3041 Severity 16 State 1
approximately once to twice a dayI see all the databases suddenly throw error 1479: Error: 1479, Severity: 16, State: 1. Database mirroring is inactive for database 'xxx'. This is an information message only. No user action is required. The mirroring connection to "TCP://MIRROR.DOMAIN.com:5022" has timed out for database "xxx" after 10 seconds without a response. Check the service and network connections. Within a few seconds, usually less error 1479 sql server than 10 I see another entry: Starting up database 'xxx'. Then a bunch of recovery messages, usually 0 transactions rolled back. Then a CHECKDB which finishes without errors then: Database mirroring is active with database 'xxx' as the principal copy. This is an informational message only. No user action is required. This happens for all databases that are mirrored and usually takes less than 20 seconds for the entire process. There are no other error codes shown, except some 18456 where users have tried to access during the time the databases are unavailable. I have a lock detector programrunning against the principalthat shows queries stuck waiting on DBMIRROR_DBM_EVENT waits, and sometimes on DBMIRROR_WORKER_QUEUE. I have tried moving the mirror to different switches and am fairly sure the network is fine as no other machines are interrupted in the same way, but I can't rule it out. Looking at performance monitor on the mirror, during these incidents I see a spike (20 or 30 times higher than usual) in Processor Queue Length, % Disk Read Time, Page Faults/sec, and big increases (5-10 times higher than usual) in Current Disk Queue Length and Processor time. Available memory does not seem to increas
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Post navigation ← Older posts How to move data files of the mirrordatabase Posted on September 26, 2010 by Amit Banerjee The ideal scenario for database mirroring would be to have the principal and secondary server instances be exact clones of each https://troubleshootingsql.com/tag/mirroring/ other from a hardware and disk space standpoint. This would ensure that the performance on http://dba.stackexchange.com/questions/56468/sql-server-principal-db-becomes-unavailable-after-problem-with-mirror-db-even the mirror instance is the same as the principal instance. But due to multiple constraints, this is not always possible. I recently had a question on how to move a secondary data file to a different physical location on the mirror instance. The catch here is that the physical data file locations on the principal and mirror instances are not the severity 16 same. Now this can be tricky if not attempted or tested in your environment. The Microsoft SQLCAT(Twitter|Blog) team has a blog post on how to move the transaction log of a mirrored database to a secondary location. We shall use the same logic for the data file as well. Steps If the server on which the data file relocation has to be done is not the mirror server currently, then failover the mirrored database so that severity 16 state the server on which the OS File has to be physically moved is the current Mirror. Change to High Performance mode if running under High Safety. Execute the ALTER DATABASE statement to move the data file to the new location on the mirror instance. Pause Mirroring to prevent any automatic failover while OS File Copy is happening. Stop the Mirror instance. Copy the file across to the new location (OS File Copy). Start the Mirror Instance. Resume mirroring and switch back to High Safety if the mirroring was running under High Safety. The mirroring should continue without any issues. Failback to original server if needed. If the data file locations are the same on the principal and mirror and the data files need to be moved to different locations on both the server instances, then this is much easier. You would need to fire the ALTER DATABASE command on the principal server instance and then move the data files to the new location after failing over the database. The new data file location would take effect only after the server instance is restarted. Technorati Tags: Database Mirroring,Microsoft SQL Server Posted in Mirroring, SQL How To | Tagged Maintenance Plans, Mirroring | Leave a comment CU10 is a must for all instances where mirroring is beingused Posted on June 28, 2010 by Amit Banerjee If you happen t
log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top SQL Server: Principal DB becomes unavailable after problem with mirror DB, even with Set Partner Safety Off? up vote 1 down vote favorite We've got a very simple mirroring setup here: just a principal DB and mirror DB, no witness, running in high-performance mode with SET PARTNER SAFETY OFF. This problem has happened to us twice now: whenever something goes wrong on the mirror server, it causes the principal DB to become unavailable. We definitely don't want that behavior! Our mirror server is located off-site at a hosting company, and they periodically run backups and maintenance which cause the mirror server to go offline. But I don't ever want the principal to go down just because of a problem with the mirror. Is there some other setting in SQL Server that I'm not seeing, besides SET PARTNER SAFETY OFF? We're running SQL Server 2012, Enterprise with SP1. I'll include the log entries here. Appreciate any tips or help you can provide! . Log from the Principal server 2014-01-08 18:14:51.43 spid36s Error: 1479, Severity: 16, State: 1. 2014-01-08 18:14:51.43 spid36s The mirroring connection to "TCP://mirrordb.mydomain.com:5022" has timed out for database "PROD" after 10 seconds without a response. Check the service and network connections. 2014-01-08 18:14:51.43 spid36s Database mirroring is inactive for database 'PROD'. This is an informational message only. No user action is required. 2014-01-08 18:19:58.51 spid36s Error: 1479, Severity: 16, State: 1. 2014-01-08 18:19:58.51 spid36s The mirroring connection to "TCP://mirrordb.mydomain.com:5022" has timed out for database "PROD" after 10 seconds without a response. Check the service and network connections. 2014-01-08 18:19:59.55 Logon Error: 18456, Severity: 14, State: 38. 2014-01-08 18:19:59.55 Logon Login failed for user 'WWW\prod'. Reason: Failed to open the explicitly specified database '