no data available in performance view after vCenter upgrade.

we have our vCenter upgrade to 4.1.0 to 4.1.2. and get the 3 warnings from vcenter service status like this: vmware performance statistics rollup past day past week not occurring database.

and i search on the web, tried below KB guide to fix it.

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&docTypeID=DT_KB_1_1&externalId=1029824

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&docTypeID=DT_KB_1_1&externalId=1007453

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004382

and some other KB..

now the warnings disappears, but i still cannot get the daily, weekly and monthly statistic info from the vcenter, nor data stored in vpx_hist_stat, vpx_hist_stat[1-4]. but i notice that there is data stored in vpx_temptable[0-1], and vpx_sample_time[1-2].

it is strange, can anyone help on this.

the database we used is oracle 11.2. we separate the database on redhat 5.2 and vcenter on windows 2008 R2.