Date: Sat, 3 Dec 2005 05:35:33 -0800 (PST) From: Arne Woerner <arne_woerner@yahoo.com> To: Shane Ambler <Shane@007Marketing.com>, FreeBSD Mailing Lists <freebsd-performance@freebsd.org> Subject: Re: Constraining CPU usage Message-ID: <20051203133533.92331.qmail@web30305.mail.mud.yahoo.com> In-Reply-To: <BFB7D0D7.3B3A7%Shane@007Marketing.com>
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--- Shane Ambler <Shane@007Marketing.com> wrote: > On 3/12/2005 3:14, "Arne Woerner" > <arne_woerner@yahoo.com> wrote: > > Why should somebody want to keep CPU usage of a > > process below a certain value (e. g. 20%)? > > Well if your machine isn't smp enabled (specifically > pre-HTT) then one process can slow the server down > to a point where your web/databse server can't get > processor time to give a response - effectively making > it non existent for the duration. > Hmm... Isn't that problem solved already by nice'ing a process? I think that problem is completely solved by idprio'ing a process... Because: When the NIC gets a packet for a database server, the kernel interrupts the executing of a potential idprio'ed process and starts the DB process... Or am I wrong? -Arne __________________________________________ Yahoo! DSL – Something to write home about. Just $16.99/mo. or less. dsl.yahoo.com
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