[Info-vax] RX2800 sporadic disk I/O slowdowns
Arne Vajhøj
arne at vajhoej.dk
Sun Oct 20 20:13:50 EDT 2024
On 10/20/2024 8:06 PM, Lawrence D'Oliveiro wrote:
> On Sun, 20 Oct 2024 19:08:41 -0400, Arne Vajhøj wrote:
>> Let me try again.
>>
>> DB write to plates & system crash => OK but slow
>
> The DB knows how to make this fast. Remember its cache is faster than any
> disk controller.
This is where the DB is writing to plates.
You can add a fourth scenario:
DB write to DB cache & system crash => guaranteed problem with transaction
Arne
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