[Info-vax] V9.2-1 Page file size

[Chris Townley]

On 25/02/2024 00:52, Arne Vajhøj wrote:
> On 2/24/2024 7:33 PM, Chris Townley wrote:
>> On 25/02/2024 00:12, Arne Vajhøj wrote:
>>> On 2/24/2024 2:18 PM, Chris Townley wrote:
>>>> Just upgraded a VM from 9.2-1 to 9.2-2 which seemed to have worked 
>>>> well.
>>>>
>>>> Bearing in mind this us just a hobbyist system, when I created the 
>>>> VM I gave it 8GB memory, and an 8Gb system disk
>>>>
>>>> That was fine, and it created a 2Mb pagefile, not expecting it to be 
>>>> used.
>>>>
>>>> The autogen run at the end of the upgrade obviously though this was 
>>>> rubbish, so tried to create an 8Gb pagefile on the system disk. 
>>>> Clearly it couldn't, so it created one of over 4Gb - leaving me with 
>>>> 120Mb free.
>>>>
>>>> It also wanted an 8Gb dumpfile.
>>>>
>>>> Is any of this sensible?
>>>
>>> I believe that is one of the differences between Windows and VMS. On
>>> Windows plenty of RAM and no/small pagefile works fine. VMS want
>>> pagefile backing of virtual memory even if it is not likely to
>>> need it. And running out of pagefile space is bad - very bad. So I got
>>> 1 x 8 GB pagefile on my VMS x86-64 and 3 x 1 GB pagefile on
>>> my VMS Alpha (can't remember what I have on my VMS Itanium).
>>
>> But VSI recommended 8Gb memory, and an 8Gb system disk. So how do we 
>> fit that in? Especially if they want another 8Gb for the dump file
> 
> I don't get it. 8 GB RAM makes sense. I would go for 20/30/40/50 GB
> disk.
> 
> I don't think you need that big a dump file. It may want that big
> a dump file, but if I remember correctly then VMS writes a subset
> of data if the dumpfile is not big enough for all data. Obviously
> if you want perfect analysis of a crash, then a full size dumpfile
> may be nice, but ...
> 
> Arne

But I only have system on the system disc. ISTR when we moved to IA64, 
we started with 8Gb, but had to increase it to have the Oracle client.

I wonder what VSI have to say. When the resolve the gateway timeout, I 
might post there

-- 
Chris