This relates to a Windows SBS 2011 server and Exchange 2010.
We are seeing the following errors in Event Log:
The resource pressure increased from Normal to Medium.
The following resources are under pressure: Queue database path ("C:\Program Files\Microsoft\Exchange Server\V14\TransportRoles\data\Queue\mail.que") = 97% [Medium] [Normal=95% Medium=97% High=99%] Queue database logging path ("C:\Program Files\Microsoft\Exchange Server\V14\TransportRoles\data\Queue\") = 97% [Medium] [Normal=95% Medium=97% High=99%] Physical memory load = 88% [limit is 94% to start dehydrating messages.]
The following components are disabled due to back pressure: Inbound mail submission from the Internet Mail submission from Pickup directory Mail submission from Replay directory Content aggregation
The following resources are in normal state: Version buckets = 0 [Normal] [Normal=80 Medium=120 High=200] Private bytes = 2% [Normal] [Normal=71% Medium=73% High=75%] Batch Point = 0 [Normal] [Normal=2000 Medium=4000 High=8000] Submission Queue = 0 [Normal] [Normal=1000 Medium=2000 High=4000]
and 15006, same message as above except the first line reads:
Microsoft Exchange Transport is rejecting message submissions because the available disk space has dropped below the configured threshold.
From my research on this it should point to lack of available disk space on the server. However, from the 494GB C: drive there is 64GB of free space. This should be plenty of space. Can anyone give me some idea on how to resolve this issue. It has happened about 4 times in the past week.
We restart the transport service or the entire server (we aren't a big company so this isn't too big a deal for us) and this resolves the issue.