After update to vCenter 5.5 U3 historical performance collection fails with error "Unable to collect performance. A specified parameter was not correct. querySpec.size".
With vCenter 5.5 Update 3 VMware has limited the size of query in order to protect the vCenter database (more information can be found in this VMware KB article).
At the moment two workarounds are available.
1. Disable the collection of historical information as described in the following KB article. This will effectively turn off the collection of historical data for all vCenter servers added to your installation of Veeam ONE.
2. Download and apply build 22.214.171.1241. With build 126.96.36.1991 the collection of historical information will be disabled for vCenter servers 5.5 Update 3 and later. vCenter versions prior to 5.5 U3 will not be affected.
To apply build 188.8.131.521, run the executable file on the machines containing Veeam ONE services, as well as on all machines, where Veeam ONE Monitor Client is installed.