Appstats is showing negative values for some of my requests on my Google App Engine development server. For example,
real=3604ms api=0ms overhead=1ms (13 RPCs, cost=-3588220, billed_ops=[DATASTORE_READ:4, DATASTORE_WRITE:-35885])
#RPCs Cost
memcache.Get 4 0
memcache.Set 3 0
datastore_v3.RunQuery 2 210 DATASTORE_READ:3
datastore_v3.Get 1 70 DATASTORE_READ:1
datastore_v3.Put 1 -3588500 DATASTORE_WRITE:-35885
memcache.Delete 1 0
search.DeleteDocument 1 0
Is a negative cost the same as a positive cost, but for delete operations?