When deleting 1000+ (link) items from a list in one batch using the COM, I encountered this exception :
Microsoft.SharePoint.Client.ServerException: The request uses too many resources
It seems that there is a limitation for the request size. This page has some details.
After some trial and error and help from that webpage above, I found out that the maximum number of deletions (in one batch) is 252. However I did not find the maximum number of new ListItem additions in one batch, so I decided to limit this to 100 in my code.
Is there a way to determine this or is there any documentation on this topic ?