redo logs tuning?

Hello!

I have installed Oracle 8.1.6.2 database on Sparc E220 with Solaris 7. Right now I mostly do some PL/SQL development. I have "Spotlight on Oracle" running almost all the time. And almost all the time it complains, that something is wrong with the REDO log buffers:
- Log buffer space waits is XX % of active waits

• Log switch wait time is is XX % of active waits
• Average redo log write time is 65.50 ms .... and explanation says that this operation should be much faster. (For example my average time is 65 ms, and it says that "modern disks should have this value less than 20 ms")

I have LOG_BUFFER=160K, three redo log files 2M each, no archivelog. Can I improve situation somehow?

WBR, Andrew

-- 
Andrew Zhilenko, AZ283-RIPE, System Administrator
           Nextra Czech Republic s.r.o. 
tel.+42-02-96159436          fax. +42-02-96159422
e-mail: andrew@nextra.com    http://www.nextra.cz
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                 Czech Republic