'Surely, you don;t(sic) mean that you would dismiss something because it's "not always relevant"?
If it applied on only 5% of the cases, it's still useful then, right?'
I think we can quibble for ever over the usefulness of a metric that is not applicable in 95% of cases. Of course we can use our skill and judgement to evaluate the importance of a low cache hit ratio is meaningful. But how much investigation is required to determine whether it matters? Is that the best use of our time? In most tuning situations I come across these days it doesn't seem relevant. YMMV (Don's obviously does).
Funnily enough one of the other threads I mentioned in my previous article demonstrated a situation where a low cache hit ratio was indeed an indicator of a bad situation. When the OP finally posted the relevant init.ora parameters we discovered
buffer cache size = 32 mb
shared pool = 76 mb
As Laurent Schneider observed, that's barely enough memory for a pocket calculator.
8 comments:
I had a good laugh on the script from 3360 ! Quite useful for to fulfill your SLA ;-)
Yeah, I like Connor's script too, I've been pointing people to it for years. If you ever get the chance see Connor present do grab it. He is a very entertaining presenter
Cheers, APC
ROFL, poor poor poor squirrel
This is why the first thing I do on a new-to-me system is just poke about and see if it looks like some newbie accepted all the defaults or something. I can't see why people throw all sorts of advice like use method-r or bhcp or statspacks at someone who hasn't even got the system to a reasonable starting point. You ought to be clued in when someone doesn't know how to show or change init.ora parameters... talk about low-hanging fruit...
word: gfewz
If you were going to buy a golf club, you wouldn't walk into a store and buy the first one you see, would you? Of course
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balls if the store has a practice spot, and look at the price, of course. If you are considering buying running shoes,
you need to go through a similar process and take the time to find the perfect shoe.
I think the comment above is a spam
A car amplifier will give you a loud and clear sound on a consistent basis. It will boost the power flowing from the
receiver to the speakers. In doing so, it will reduce the stress put on all the other components of your car stereo
system, including the receiver.
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