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2022-09-02: APP 2.0.0-beta4 has been released !

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windows 2.0.0-beta4

macOS x86_64 2.0.0-beta4

macOS arm64 M1 2.0.0-beta4

Linux DEB 2.0.0-beta4

Linux RPM 2.0.0-beta4

Star Analysis is suddenly taking a very long time


(@danjcollett)
Molecular Cloud Customer
Joined: 8 months ago
Posts: 5
Topic starter  

Hi,

First post, been using APP for around 12 months or so. Recently (as in this week) my star analysis takes an age, I have loaded around 100 lights into APP and started a run, star analysis started at 09:45 and now at 10:30 it has only analysed 22 lights. For clarity this step used to take maybe a couple of minutes. Nothing on my PC has changed, have I accidentally bumped a setting in APP or something? Any thoughts?

I have added a screen grab to show what I mean its takes well over 1 minute per light frame. This used to take a few seconds per frame. I am using APP version 1.083.4

app slow star analysis

 Thanks,

Dan


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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4987
 

Tricky to say, are you using a different location for your data perhaps?


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(@danjcollett)
Molecular Cloud Customer
Joined: 8 months ago
Posts: 5
Topic starter  

Fair question, short answer is no, same location and its an NVMe drive so not like read/write is an issue, I should say all the other steps are lightning quick


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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4987
 

Interesting, I wouldn't have a good idea as to why that happens other than a hardware IO issue somehow. Very silly question, but does a restart of the system have any influence?


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(@danjcollett)
Molecular Cloud Customer
Joined: 8 months ago
Posts: 5
Topic starter  

Nope no change and I have fast boot disabled (I have another application that hates fast boot being on) 

 

I am a bit stumped as to what is causing it, I can see the CPU spikes dropping massively in between and during each sub run during the star analysis phase where as before it would stay at 100% until it was done. It feels like I have bumped a setting somewhere in APP but the Star Analysis tab basically has one option the star detection is set to auto and 500 stars. I wonder if thats too many perhaps. Though I dont recall having changed this or had it at a different number previously..


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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4987
 

Yes, me too, maybe I can check your files if you want to see if star analysis is fast on them or somehow cause an issue? I think that's very unlikely though. Do you have the possibility to test it on another fast drive?


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(@danjcollett)
Molecular Cloud Customer
Joined: 8 months ago
Posts: 5
Topic starter  

aaaand now it's fine, well different data set, from Cygnus rather than Cassiopeia but the Star Analysis for this data took 2 minutes like normal. Must be something to do with the sould neb region! Oh well at least it's ok for now!


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(@danjcollett)
Molecular Cloud Customer
Joined: 8 months ago
Posts: 5
Topic starter  

and the issue has returned! Can I get some test data to someone to see if they have the same issue as me? Its not going to take 3 or so hours to run 145 frames through Star Analysis!


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(@vincent-mod)
Quasar Admin
Joined: 5 years ago
Posts: 4987
 

Oh dear, that is very strange. Would you be able to try out the new beta 3 version of APP 2.0? Still don't think that will help, but just in case...


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(@sidiouss)
Molecular Cloud Customer
Joined: 4 years ago
Posts: 7
 

I am suffering from the same issue in one of my datasets... I have 196 lights that are now star analysed for over 24h now... It takes almost 5-6mins to analyse the sub... I will wait until it is done as the computer is running already, however I will check if new beta will solve that issue. I am using USB 3.2 portable hard drive and have not such an issue so far...


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(@wvreeven)
Galaxy Admin
Joined: 4 years ago
Posts: 1881
 

@sidiouss Hi! Even though you haven't had issues before, I suspect that the external HD is the culprit. APP is very I/O intensive and external HDs are notoriously slow in the respect. You may want to consider copying your data to the internal HD for processing or buying an SDD because those are MUCH faster.


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(@mabula-admin)
Quasar Admin
Joined: 5 years ago
Posts: 3228
 

@sidiouss & @wvreeven, and older APP version could enter a long loop trying to analyse the stars. The new 2.0.0-beta4 should not have this issue 😉 beta4 has improved star analysis which should not do this.


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(@sidiouss)
Molecular Cloud Customer
Joined: 4 years ago
Posts: 7
 

@mabula-admin Thanks, I will check that for sure. APP proceeded to the Normalization now which looks quite fast as usual, so I will check after the integration newer version of APP. (So far I am using beta 2.0)


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(@sidiouss)
Molecular Cloud Customer
Joined: 4 years ago
Posts: 7
 

@mabula-admin I'd like to confirm that the beta 2.0 was the cause of the slow star analysis. Beta 4.0 fixes this problem so far 🙂


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(@sidiouss)
Molecular Cloud Customer
Joined: 4 years ago
Posts: 7
 

I have tested beta 4.0 and it is faster than the previous releases. Unfortunately, however the star analysis should be more robust it actually cannot detect stars properly. It was able to detect stars in 96 from 180 subframes whereas downrevision to 1.083.4 could properly star analyse all the frames...


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