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From: John Levine <johnl@taugh.com>
Newsgroups: comp.arch
Subject: Re: big, fast, etc, was is Vax addressing sane today
Date: Fri, 13 Sep 2024 21:50:15 -0000 (UTC)
Organization: Taughannock Networks
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It appears that Michael S  <already5chosen@yahoo.com> said:
>> There's also a rule of thumb about databases that says one system of
>> performance 100 is much better than 100 systems of performance 1
>> because those 100 systems will spend all their time contending for
>> database locks.
>
>How many transactions per minute does world's biggest company need at
>peak hours? 

Ten years ago Visa could process 56,000 messages/second. It must be a
lot more now. I think a transaction is two or four messages depending
on the transaction type.

>Is not this number small relatively to capabilities of
>even 15 y.o. dual-Xeon server with few dozens of spinning rust disks?

Uh, no, it is not.


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John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly