If I were you, I will check: 1. Metalink. See any known issues. Like necessary os patch/oracle bug. 2. Tusc to see what the system call lgwr/arch is doing that time. 3. CHeck os log to see if anything abnormal. 4. see v$session_wait. 5. try archive log stop; archive log start to try re-post the archive proce= ss. On 4/22/05, stephen booth <stephenbooth.uk@xxxxxxxxx> wrote: > On 4/22/05, GovindanK <gkatteri@xxxxxxxxxxx> wrote: > > Of late we ran into this problem. For some vague reasons the log switch > > does not take place and the system hangs.=3D20 >=20 > Have you checked it's not a case of LGWR catching up with ARCH so it > has to wait for ARCH to release a log group before it can overwrite > it? >=20 > Stephen >=20 > --=3D20 > It's better to ask a silly question than to make a silly assumption. > -- > //www.freelists.org/webpage/oracle-l >=20 --=20 Regards Zhu Chao www.cnoug.org -- //www.freelists.org/webpage/oracle-l