Re: [vserver] which guest hit the memory limit?

Edward Capriolo wrote:
> On Wed, Aug 5, 2009 at 5:04 AM, Rik Bobbaers<rik@enzoverder.be> wrote:
>>> first, this is no virtual machine. :)
>>> second, there is no method to reset the hit counter
>>> but there is one to reset the min/max ... this is
>>> mainly because there is no real point in resetting
>>> the counter (at least IMHO :)
>>>
>>> best,
>>> Herbert
>>>
>>> PS: it would be trivial to add this, if you can
>>> provide a good argument why that would be useful :)
>>
>> i can take this one...
>> if you know for example, that your machine went "over its limits" on an
>> import of a database, compile of "something", or just a batch task... and
>> you KNOW it does that once at startup, or each night, but you want to
>> check if it happens again afterward. it's easier to do your heavy
>> computations, when it's settled, reset counters and see if in "normal
>> operation", it happens too.
>>
>> say i have a webserver running , but each morning i need to load some
>> shitload of pictures to it which makes it prone to memory problems, but i
>> know, i don't care... it would be nice to reset to 0, then test/see if it
>> remains 0 for the rest of the time
>>
>> good reason or not? i don't know, but a reset button on counters is always
>> a good idea imho :)
>>
>> Rik Bobbaers
>>
>> -- http://harry.enzoverder.be
>> linux/unix/system/network/security/hardware/DR admin
>>
>>
>
> I can make a use case for always wanting a reset as a user feature.
>
> Enter busy NFS servers. I want to be able to graph clients and servers
> to see, who is using the most NFS ops. Enter a 32 bit OS level
> counter, a counter that has been 32 bit for over 6 years of bug
> reporting.
> http://www.freebsd.org/cgi/query-pr.cgi?pr=103682&cat=bin
>
> Eventually you hit a wrap around condition (this may not be the case
> with vserver). The only way to fix it is restart/reboot.
>
> That stinks! because you spend half your life bragging about high *nux
> uptime but then you need to reboot/restart for your counters, and you
> lose your bragging rights. With a 64 bit counter needed a reset is
> unlikely, but if they are 32 bit it does come into play. So yes reset
> is always useful for stat guru's like myself :)

Why do you need to reset it? Wrap arounds by definition mean it gets
reset... And every single statistics software I've worked with has had
data types for values that wrap around.

-- 
Daniel Hokka Zakrisson