Windows 10 Performance Options

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William Bristow

Hi Martin.

Good to hear that you have made some progress with HOPS.

I can’t explain why HOPS will not calibrate your images, with the test images I have it works with quite large data sets and I have not experienced any hangs during calibration.

As your other processing programs are able to calibrate successfully the same data volume without problems I can’t really guess what might be going wrong when you try to run calibration in HOPS.

There are just a couple of items I can think of to double check:

With HOPS, the reduction and science files must be in the same source folder, no sub-folders are allowed. Hops does not identify and sort frame types from the fits header but reads frame type from the file name and therefore relies on the user to create unique file names for each of the reduction frame types and the reduction frames must not have the same identifying name as the science frames.

A long shot – in Windows 10, type “Control Panel” in the search box on the bottom toolbar and open the “Control Panel App” to bring up the classic Windows Control Panel > Click on the “System” icon > In the System page click “Advanced system settings”, the “System Properties” window will open > Click the “Advanced” tab,  at the top of the “Advanced ” tab click the “Settings” button under the “Performance” option, the Performance Options windows will open > Click the ‘”Advanced” tab in the “Performance options” window and under “Virtual memory” click the “Change” button, The “Virtual Memory” tab will open > Deselect the option “Automatically manage paging file size for all drives” and select the Custom size button > If you have more than one drive you can define a page file to be used as virtual memory on each drive and Windows performance will improve if you are able to define page files on multiple fixed drives but for this walk-through assume only one drive is present > Select the first available drive (C:) and set the “Initial size (MB)” for the page file, the recommendation here is to set at least 420 MB > Set the “Maximum size (MB)” to be at least a third of the available free space remaining on the drive, (the free space remaining is displayed just above the Custom size boxes) ideally, to assure adequate resources are available during post processing the Maximum size should be at least 20000MB (~20Gb) > With those figures entered click the “Set” button > Repeat for additional fixed drives if present and then click “Apply” and “OK” your way out of all open windows then reboot the computer for those changes to take effect.

If that solves the problem during calibration then it was a page file too-small issue and Windows had run out of available disk space for swap files, if the problem is not helped by this then revert the Page File control to Automatic.

If I can find anything else relevant I will update the thread.