2.5.52, load and process in D state
From: Andrew Morton <[email protected]>
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Quoted 9 lines · Paolo Ciarrocchi
Hi all,
I booted 2.5.52 with the following parmater:
apm=off mem=32M (not sure about the amount, anyway I can reproduce the problem for sure with 32M and 40M)Then I tried the osdb (www.osdb.org) benchmark with 40M of data.
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$./bin/osdb-pg --nomulti
the result is that aftwer a few second running top I see the postmaster process in D state and a lot if iowait.
What exactly _is_ the issue? The machine is achieving 25% CPU utilisation in user code, 6-9% in system code. It is doing a lot of I/O, and is getting work done.
The issue it that with 2.4.19 the postmaster process never go in D state and iowait always reports 0%.
Sounds strange with me.
Ciao,
Paolo
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