I have one document center site collection in SharePoint 2010, when users upload documents I got below errors and SQL Server CPU grows to 90%, this issue happens when the number of concurrent users uploading documents when high
System.Web.HttpException: Request timed out.
System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.
ConnectionString: 'Data Source="";Initial Catalog="";Integrated Security=True;Enlist=False;Connect Timeout=15' ConnectionState: Closed ConnectionTimeout: 15
Exception while assigning Document ID: 0x80131509