We have HP-UX 11.0 and are having IO problems. Oracle and HP say to set a mount parameter mincache=direct. We currently have it set to mincache=tmpcache. But when we set it to "direct" the db slows down to the point it's unusable. HP said to increase the db_block_buffers, so we increased then from 30k to 130k (8k block). That's 1GB. The db was a little more usable but still sucked. So we set the buffers back to 30k and reset mincache back to tmpcache. Now the db is again usable, but we there's still something wrong with IO. sar reports WIO at +80%. ORacle says that should be close to 0%. We are using HP's LVM (resold veritas) and cooked files. Any ideas? thanks
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