PMON unable to acquire latch

From: kiteman <dkight_at_bigfoot.com>
Date: Sun, 28 Jan 2001 20:04:45 -0500
Message-ID: <Bk3d6.5197$Dd.23375749@news1.mia>

I'm getting the error below every 5-6 hours. It mentions something about modifying parameter values. Any idea paramters are being referred to? Any help would be greatly appreciated.

Dump file/opt/oracle/admin/win4prod/bdump/win4prod_pmon_26092.trc Oracle8 EnterpriseEdition Release 8.0.4.3.0 - Production With the Partitioning option
PL/SQLRelease 8.0.4.3.0 - Production
ORACLE_HOME =/opt/oracle/app/oracle/product/8.0.4 System name: SunOS
Node name:epfwpf03

Release: 5.6
Version: Generic_105181-16
Machine:sun4u

Instance name: win4prod
Redo thread mounted by this instance: 1
Oracleprocess number: 2
Unix process pid: 26092, image: ora_pmon_win4prod Fri Jan 2613:48:01 2001
*** SESSION ID:(1.1) 2001.01.26.13.48.01.000 PMON unable to acquire latch 80001fec modify parameter values possible holder pid = 28ospid=24678
Fri Jan 26 13:48:01 2001 Received on Sun Jan 28 2001 - 19:04:45 CST