User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:49.0) Gecko/20100101
Firefox/49.0 SeaMonkey/2.46 Lightning/5.1b1
Build Identifier: 

I see that plasmashell use a lot of resources in some cases
i could relate this to dumps of baloo_file_extractor
output coredump -list
Fri 2017-07-21 09:10:48 CEST  29100  1000   100  11 present  
/usr/bin/baloo_file_extractor
output of "coredumpctl dump 29100 -o /tmp/output.core"
coredumpctl dump 29100 -o /tmp/output.core
           PID: 29100 (baloo_file_extr)
           UID: 1000 (philippe)
           GID: 100 (users)
        Signal: 11 (SEGV)
     Timestamp: Fri 2017-07-21 09:10:48 CEST (41min ago)
  Command Line: /usr/bin/baloo_file_extractor
    Executable: /usr/bin/baloo_file_extractor
 Control Group: /user.slice/user-1000.slice/session-27.scope
          Unit: session-27.scope
         Slice: user-1000.slice
       Session: 27
     Owner UID: 1000 (philippe)
       Boot ID: 52027093ad28427c98409b8e39cc72a6
    Machine ID: a101a70076324be7995d68b67cb57aa7
      Hostname: hpprol2
       Storage:
/var/lib/systemd/coredump/core.baloo_file_extr.1000.52027093ad28427c98409b8e39cc72a6.29100.1500621048000000.lz4
       Message: Process 29100 (baloo_file_extr) of user 1000 dumped core.

this occurs every time after a reboot and opening the first kde session.
quitting the session and reload it doesn't give again a dump (but sometime
yes),
After some time I see another dump and again plasmashell use a high %age of cpu
(up to 140% ) Remark that I have an hexa core intel processor
I'll link the output of the coredumpctl
this occurs from sometime with different kernels

Reproducible: Sometimes

Steps to Reproduce:
1.reboot
2.start kde
3.list dump ==> baloo_file_extractor dumped 
4. plasma shell use a lot of cpu resource
Actual Results:  
baloo_file_extractor dumped and plasmashell use a lot of cpu resource


Expected Results:  
no dump of baloo_file_extractor