process becomes state of "uninterruptible sleep" after 1hour running

I run a job which inserts a lot of Records in an Oracle-DB (10g) which is installed on a SUSE ES9. After 1 hour of running, this job becomes the process state 'D' (uninterruptible sleep). After this change of process state, the followed inserts are very slow and the Server-CPU is comming down.

Any ideas?
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state 'D' usually means, that the process is waiting on I/O to finish (ie. is writing to file, and waits for that to finish).
It's possible, that You have too slow hdd's, or in other words, too slow for 10G database.

Also check with 'top' if any process eat whole CPU.
Also check, if You memory isn't eat by SQLserver, and server is swapping heavily.

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