I am experiencing a strange issue where randomly our file and print server becomes slow to browse over the network and stops accepting print jobs.
About the server:
Windows Server 2008 R2 hosted on VMware ESXi 5.0
8 vCPU (2 vSocket)
When all is working well we have roughly 50 users connecting to files and printers on this machine from Windows 7 professional. CPU is less than 10% and RAM usage 16% on average.
Randomly the file server will become instantly slow to browse files over the network, no gradual process and printing will fail - no jobs accepted, nothing shows in print queue on the server itself.
Logging into remote desktop or esxi console resources are not elevated, CPU is between 6 and 10% with RAM remaining steady at about 17 - 18%
Resource monitor show low disk activity and almost no network activity. Browsing the files locally shows no issue and file transfers from one vDisk to another show no performance loss - strictly impacts SMB traffic only.
Browsing the event logs provides no information as to what could be failing.
If we reboot the server it comes up right away and performance is normal.
All backups are performed exact the same every day, virus scan runs at the same time every night. Issue is completely random, the last 4 failures occurred and different intervals.
Previous 1: 10 days ago
Previous 2: 4 days prior to that
Previous 3: 26 days prior to that
- Turned off all TCP offloading
- Removed 3 file shares that referenced non-existent locations
- Attempts to restart the "Server" service during failure do not succeed - service gets hung at stopping