rashmidixit commented on CLOUDSTACK-9405:

Github user serg38 commented on the issue:

    Thanks @ustcweizhou LGTM for code review

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> listDomains API call takes an extremely long time to respond
> ------------------------------------------------------------
>                 Key: CLOUDSTACK-9405
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9405
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: API
>    Affects Versions: 4.8.0
>            Reporter: dsclose
>              Labels: performance
> We recently upgraded from Cloudstack 4.5.2 to Cloudstack 4.8.0. Since this 
> update, the listDomains API call has started taking an extremely long time to 
> respond. This has caused issues with our services that rely on this API call. 
> Initially they simply timed out until we increased the thresholds. Now we 
> have processes that used to take a few seconds taking many minutes.
> This is so problematic for us that our organisation has put a halt on further 
> updates of Cloudstack 4.5.2 installations. If reversing the update of zones 
> already on 4.8.0 was feasible, we would have reverted back to 4.5.2.
> Here is a table of the times we're seeing:
> ||CS Version||Domain Count||API Response Time||
> |4.5.2|251|~3s|
> |4.8.0|182|~26s|
> |4.8.0|<10|<1s|
> This small data sample indicates that the response time for zones with a 
> larger amount of domains is significantly worse after the update to 4.8.0. 
> Zones with few domains aren't able to reproduce this issue.
> I recall a bug being resolved recently that concerned reducing the response 
> time for list* API calls. I also recall [~remibergsma] resolving a bug 
> concerning the sorting of the listDomains response. Is it possible that these 
> issues are connected?

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