How often should a database archive its logs

Oracle 9i, Windows 2003
Our production database archives logs every 2mins and retaining those logs is becoming a problem, I was wondering if its healthy for a database to archive log evry 2mins and if not what do i need to do.
thanks in advance

I did see the link you posted earlier and it doesn't say very much, does it? Apart from
(1) big logs don't affect LGWR performance
(2) small logs will cause extra checkpoints to take place apart from those you wanted to take place by setting FAST_START_MTTR_TARGET
Well, taken together, both those points mean big logs are good news and small ones aren't. Which is exactly what I said above!
Unfortunately, you've completely missed the actual point I was making. It had nothing to do with "recovery time being a concern" nor with 100M being 100M and taking the same amount of time to apply.
It was actually point (2) above. I want logs big enough not to cause rapid log switching. But I have bulk loads. Therefore, I have to have ENORMOUS logs to prevent rapid log switching during those times. In fact, on one database I am connected to right now, I have 2GB redo logs which nevertheless manage to switch every 8 minutes on a Friday night. You can imagine the frequency of log switches we had when those logs were originally created at 5MB each! And the number of redo allocation retries...
Personally, I'd like 8GB logs to get it down to a log switch every 30 minutes or so on a Friday night, but with multiple members and groups, that's just getting silly.
But now I have an enormous log that will take forever and a day to fill up and switch when I'm NOT doing bulk loads. Ordinarily, without a forced log switch, my 2GB log takes 3 days to fill up.
If I were to have a catastrophic hardware failure, I could lose my current redo log. FAST_START_MTTR_TARGET can't do anything to ameliorate that loss: flushing the dirty buffers to disk regularly doesn't protect my data, actually. In fact, there is no way to recover transactions that are sitting in the current redo log if that log is lost. Therefore, having an enormous log full of hours and hours (in my case, about 72 hours'-worth) of redo is a massive data loss risk, and not one I'm prepared to take.
Therefore, ARCHIVE_LAG_TARGET allows me to have huge logs to deal with (2) above, but not to have more than half an hour's data at risk from total loss.
I know why the parameter was invented. I can understand the word "target" in its name, after all. But the WAY it achieves its design goals is simply to force log switches. And forcing log switches is a good thing for everyone to be able to do, when appropriate, even if they're not using Data Guard and standby databases.
You are at liberty, of course, to keep on reserving your opinion, but in this case it's ill-informed and missing the point: loss of the current log is not nice and regular log switches means the effects of that unlikely event happening are completely predictable and (importantly) containable.
That's just one advantage, not "loads". But it's a huge one.

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