Hi, We have 2-node oracle rac db on window platform. SQL> select version from v$instance; VERSION ----------------- 10.2.0.1.0 SQL> select * from v$active_instances; INST_NUMBER INST_NAME ----------- ---------------------------------------- 1 DEVWIN16:winracdb1 2 DEVWIN15:winracdb2 Oracle Clusterware was upgraded to 10.2.0.3 with "10g Release 2 (10.2.0.3) Patch Set 2 for Microsoft Windows (32-Bit)" The problem is that while the rac db is up and running (but with no db activities from any applications), we found racgimon.exe is taking about 15% cpu usage, followed by ons.exe of about 10% cpu usage. Using a tool called "Filemon", we found racgimon.exe is trying to write to a file called F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor. The file isn't there and the exe just keeps trying to open it... over.. and over.. I then manually created an empty file F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor, but that did not help. Now when I look at Filemon log: 879304 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS FileFsVolumeInformation 879305 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor BUFFER OVERFLOW FileAllInformation 879306 4:09:29 PM racgimon.exe:3080 CLOSE F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS 879307 4:09:29 PM racgimon.exe:3080 OPEN F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS Options: Open Access: All 879308 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS FileFsVolumeInformation 879309 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor BUFFER OVERFLOW FileAllInformation 879310 4:09:29 PM racgimon.exe:3080 CLOSE F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS 879311 4:09:29 PM racgimon.exe:3080 OPEN F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS Options: Open Access: All 879312 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS FileFsVolumeInformation 879313 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor BUFFER OVERFLOW FileAllInformation 879314 4:09:29 PM racgimon.exe:3080 CLOSE F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS 879315 4:09:29 PM racgimon.exe:3080 OPEN F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS Options: Open Access: All 879316 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS FileFsVolumeInformation 879317 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor BUFFER OVERFLOW FileAllInformation 879318 4:09:29 PM racgimon.exe:3080 CLOSE F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS 879319 4:09:29 PM racgimon.exe:3080 OPEN F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS Options: Open Access: All 879320 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS FileFsVolumeInformation 879321 4:09:29 PM racgimon.exe:3080 QUERY INFORMATION F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor BUFFER OVERFLOW FileAllInformation 879322 4:09:29 PM racgimon.exe:3080 CLOSE F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS 879323 4:09:29 PM racgimon.exe:3080 OPEN F:\oracle\product\10.2.0\db_1\opmn\conf\.formfactor SUCCESS Options: Open Access: All Does anyone encounter similar situations? And is it normal that they take that level of CPU usage? Thanks. Guang