[Info-vax] V9.2-1 Page file size
Chris Townley
news at cct-net.co.uk
Sun Feb 25 08:48:56 EST 2024
On 25/02/2024 04:11, John H. Reinhardt wrote:
> On 2/24/2024 7:02 PM, Chris Townley wrote:
>> 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'm not sure where you saw that, but section 1.2.1 of the V9.2-2 Install
> says:
> https://docs.vmssoftware.com/vsi-openvms-x86-64-v922-installation-guide/#d0e99
>
> Memory: 8 GB.
>
> Note that if your installation fails due to the lack of memory, you can
> increase the amount of it for the duration of the installation and then,
> if needed, reduce it back.
>
> Operating system: Other 64-bit.
>
> A virtual disk for the system files. The disk must be at least 15 GB in
> size
>
>
>>> 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
>>
>
> On my V9.2-2 install (not upgrade)I created a 24GB system disk. I
> allocated 12GB of memory and it creates a 2MB page file. Install left
> 10.2GB free so Install uses about 14GB on my system. This includes an
> 11.74GB dump file to match the 11.74GB usable memory. Autoconfig at the
> end did not try to make a bigger page file nor create a swapfile.
>
>
>
>
> Disk NORTON$DKA0:, device type VMware Virtual disk, is online, mounted,
> file-
> oriented device, shareable, available to cluster, error logging is
> enabled.
>
> Error count 0 Operations
> completed 11874
> Owner process "" Owner UIC
> [SYSTEM]
> Owner process ID 00000000 Dev Prot
> S:RWPL,O:RWPL,G:R,W
> Reference count 30 Default buffer
> size 512
> Current preferred CPU Id 1
> Fastpath 1
> Total size 24.00GB Sectors per
> track 0
> Total cylinders 0 Tracks per
> cylinder 0
> Logical Volume Size 24.00GB Expansion Size Limit
> 383.99GB
>
> Volume label "NORTON_A0" Relative volume
> number 0
> Cluster size 3 Transaction
> count 182
> Free space 10.27GB Maximum files allowed
> 16711679
> Extend quantity 5 Mount
> count 1
> Mount status System Cache name
> "_NORTON$DKA0:XQPCACHE"
> Extent cache size 64 Max blocks in extent cache
> 2153983
> File ID cache size 64 Blocks in extent
> cache 30345
> Quota cache size 0 Maximum buffers in FCP
> cache 4734
> Volume owner UIC [1,1] Vol Prot
> S:RWCD,O:RWCD,G:RWCD,W:RWCD
>
> Volume Status: ODS-5, subject to mount verification, protected
> subsystems
> enabled, file high-water marking, write-through XFC caching enabled,
> write-through XQP caching enabled, hard links enabled, special files
> enabled.
>
> $ show mem
> System Memory Resources on 24-FEB-2024 22:05:53.79
>
> Physical Memory Usage (bytes): Total Free In Use
> Modified
> Main Memory (GB) 11.74 11.15 0.58
> 0.00
>
> Extended File Cache (Time of last reset: 16-FEB-2024 22:59:52.90)
> Allocated (MBytes) 32.50 Maximum size (MBytes)
> 6014.39
> Free (MBytes) 0.64 Minimum size
> (MBytes) 3.12
> In use (MBytes) 31.85 Percentage Read
> I/Os 84%
> Read hit rate 59% Write hit
> rate 0%
> Read I/O count 7545 Write I/O
> count 1368
> Read hit count 4482 Write hit
> count 0
> Reads bypassing cache 26 Writes bypassing
> cache 1
> Files cached open 205 Files cached
> closed 137
> Vols in Full XFC mode 0 Vols in VIOC Compatible
> mode 2
> Vols in No Caching mode 0 Vols in Perm. No Caching
> mode 0
>
> Granularity Hint Regions (bytes): Total Free In Use
> Released
> S0 Execlet data (MB) 16.00 14.53
> 1.46 0.00
> S0 Executive data (MB) 36.00 0.15
> 35.84 0.00
> S0 Executive RO data (MB) 8.00 6.54
> 1.45 0.00
> S0 Resident image code (MB) 24.00 23.35
> 0.64 0.00
> S0 Resident image data (MB) 4.00 4.00
> 0.00 0.00
> S0 Resident RO image data (MB) 8.00 8.00
> 0.00 0.00
> S2 Execlet code (MB) 32.00 15.16
> 16.82 0.00
> S2 Execlet data (MB) 32.00 32.00
> 0.00 0.00
> S2 Executive data (MB) 8.00 0.00
> 8.00 0.00
> S2 Resident image code (MB) 32.00 11.80
> 20.19 0.00
> S2 Resident image data (MB) 4.00 4.00
> 0.00 0.00
>
> Slot Usage (slots): Total Free Resident
> Swapped
> Process Entry Slots 949 936
> 13 0
>
> Dynamic Memory Usage: Total Free In Use
> Largest
> Nonpaged Dynamic Memory (MB) 24.00 21.56 2.43
> 21.50
> USB Addressable Memory (KB) 1024.00 1022.87 1.12
> 1022.87
> Paged Dynamic Memory (MB) 11.74 6.80 4.93
> 6.80
> Lock Manager Dyn Memory (KB) 592.00 306.03 285.96
> S2 Dynamic Memory Usage (MB) 7.97 7.69 0.28
> 7.69
>
> Buffer Object Usage (bytes): In Use
> Peak
> 32-bit System Space Windows (S0/S1) (bytes)
> 0.00 0.00
> 64bit System Space Windows (S2) (bytes)
> 0.00 0.00
> Physical bytes locked by buffer objects (bytes)
> 0.00 0.00
>
> Memory Reservations (bytes): Group Reserved In Use
> Type
> Total (0 bytes reserved) 0 0
>
> Paging File Usage (bytes): Index Free
> Size
> DISK$NORTON_A0:[SYS0.SYSEXE]PAGEFILE.SYS;1
> (MB) 254 2.18
> 2.18
> Total committed paging file usage:(MB)
> 18.71
>
> Of the physical memory in use, 572.25 MB are permanently allocated to
> OpenVMS.
> $ dir DISK$NORTON_A0:[SYS0.SYSEXE]PAGEFILE.SYS;1
>
> Directory DISK$NORTON_A0:[SYS0.SYSEXE]
>
> PAGEFILE.SYS;1 2.24MB/2.24MB
> 27-JAN-2024
> 19:55:46.08 [1,1] (RWED,RWED,,)
>
> Total of 1 file, 2.24MB/2.24MB
>
> $ dir DISK$NORTON_A0:[SYS0.SYSEXE]sysdump.dmp
>
> Directory DISK$NORTON_A0:[SYS0.SYSEXE]
>
> SYSDUMP.DMP;1 11.74GB/11.74GB
> 27-JAN-2024
> 21:41:45.65 [1,1] (RWED,RWED,,)
>
> Total of 1 file, 11.74GB/11.74GB
>
OK, I clearly need to rebuild a larger system disk
Many thanks
--
Chris
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