Hi any body pl help me,

i am working in 4 gb database in California, Financials dept,

i have exported database schema from 8.1.5 db, & imported to 8.1.6 db & i have recompiled all Objects, & i have Analyzed with compute statistics, the database whenever shutdown & restarts it works for 1 week fine after 7 days it going slow down, whenever query parses it will hang.

& i am getting in my alert log this error.
SMON: Parallel transaction recovery slave got internal error
SMON: Downgrading transaction recovery to serial
Thu Nov 21 19:13:22 2002
Errors in file E:\ORACLE\admin\NFA\bdump\nfaSMON.TRC:
ORA-00600: internal error code, arguments: [4142], [4294967295], [], [], [], [], [], []

ORACLE Instance nfa (pid = 6) - Error 600 encountered while recovering transaction (6, 13) on object 22071.
Thu Nov 21 19:13:23 2002
Errors in file E:\ORACLE\admin\NFA\bdump\nfaSMON.TRC:
ORA-00600: internal error code, arguments: [4142], [4294967295], [], [], [], [], [], []


Please help me.

Radha . S