do you have VMXNET3 (prefered) vNIC or E1000 ?.do you use PVSCSI adapter for LOG and DATA drives ? The semaphore timeout period has expired message occurs when your system fails to transfer files from the source drive to the destination drive due to reasons.I would check VM configuration it self, especially disk layout, does disk with logs are separate and on faster drives then and data disk ?.maybe backup is taken to rarely and when backup starts it's takes too long causing grow of snapshot file to monstrual sizes ?.change a backup window for that SQL server (do it ouside office hours during low workload).move VM on to dedicated datastore and perform test (backup + SQL operations).In general you shouldn't notice (on OS level) any pause during snapshot commitment. I pretty much leave my sessions open 24x7 for months. Im having difficulty narrowing down the issue because I was previously running WinXP and whatever sCRT was max for that OS and basically never got this semaphore disconnect. While host committing snapshot to VM very high IOPS load take place + IOPS from other VMs ( I assume that server lays on shared datastore across multiple VM's) + your operations on SQL itself it gives huge workload to underlying storage. I feel like Im seeing this 'The semaphore timeout period has expired.' frequently since upgrading. I never had that error message but from information which you provided look like storage is a bottle neck there.
Is there any way to reduce the paused period during snapshot removal without affecting the backups Just wondering has anyone else experienced any issues like this and found any ways to resolve them. Our own thoughts is that the error is related to the pause take can take place on the SQL Server during the snapshot removal. Seems to be when the snapshot removal is taking place. We have done some troubleshooting with the company and found that the message occurs at the end of backup of the SQL server. (provider: TCP Provider, error: 0 - The semaphore timeout period has expired.)īasically it would seem that no response comes from the SQL server during this time and the error is thrown. Message: A transport-level error has occurred when receiving results from the server. All is perfect with the service except sometimes we get a message like the one below when running distributed transactions against our SQL server from our.
Seagate drive semaphor period has timed out windows#
The VMware machines are windows 2008 servers - 圆4 (SQL 2008/.net application servers). They also use Veeam backup to backup our VM’s. We have a service provider who provides us with VM machines on VMware platform. I just posting this message in the hope that someone else might have ran into this issue before and Maybe found a solution for it.
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