Very offen I see error "WSUS synchronization fails with HTTP Error 503"
CAUSE
- The WsusPool Application Pool in IIS is in a Stopped state.
- The Private Memory Limit (KB) for the Application Pool is set to the default value of 1843200 KB.
RESOLUTION
Consult with your systems administrator before you perform this procedure.
- Open the IIS Manager.
- Expand your site to find Application Pools.
- In the center pane, select WsusPool.
- In the Actions pane, click Start.
- Increase the Private Memory Limit to 4GB (4000000 KB).
- Stop the EminentWare Data Grid Server Service.
- In the center pane, select WsusPool.
- Under Edit Application Pool, click Advanced Settings.
- Manually set the Private Memory Limit to 4GB (4000000 KB).
- Restart the Application Pool.
- Start the EminentWare Data Grid Server Service.