Re: What MB/s is pulled from your buffer cache?

From: Martin Klier <usn_at_usn-it.de>
Date: Tue, 12 Feb 2013 22:20:45 +0100
Message-ID: <511AB22D.1000105_at_usn-it.de>

Sorry, obviously my numbers (TB column) were wrong. This is the new one:

CACHE_READ_BYTES CACHE_READ_BYTES_TB STARTUP_TIME UPTIME_DAYS UPTIME_SECONDS BYTES_PER_SEC

---------------- ------------------- --------------------- -----------
-------------- -------------
         2.5E+16         22718.03589 16.12.2012 18:11:49         58.17
      5025692    4970209998

So it's 4,970,209,998 Bytes per second overall. Fairly less than yours. :)

Background: This is a devel DB, so usually they are doing fuzzy stuff.

Martin Klier schrieb:

>> It's over 100MB/s, which my knee jerk (emphasis on the latter) tells me that
>> this seems abnormally high for our li'l DB.
>>
>> I'm curious to see how that number compares to other installations, if folks
>> are willing.

>
> This heavily depends on the quality of your execution plans - have a
> look at SQL "SQL ordered by Buffer Gets" in AWR/Statspack reports. I
> don't think that number to be abnormally high...

>
> The DB is less than 2TB.

Regards
Martin Klier

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Received on Tue Feb 12 2013 - 22:20:45 CET