Via Mail:
> Here is the description of lsof issue in case of many threads process with a
> lot of open files: bug#1036304
> In brief it means that lsof will list all open files by the process for every
> thread of this process if -K parameter is specified. For example if there are
> 1000 threads and 7000 files opened, 7000000 records will be in the output for
> this particular process.
> At least two customers in our region have such issue and it takes up to
> 15 minutes for example to zypper to respond for the command due to the lsof
> stalled on the output of such a long list.

With `lsof >= 4.90` we should consider to use '-K i'.