Calendar reminder hogging 500+ MiB

According to my system monitor, there’s a calendar reminder app hogging 500+ MiB memory:
image

but top | grep cal doesn’t return any result.

What’s this calendar reminder application? How can I remove it?

here’s the full log from top:

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND                                                                                                                       
   5344 user      20   0 2852592 257996 154176 S 14.93 3.658   1:30.39 plasma-systemmo                                                                                                               
   1778 root      20   0 1123568 109660  50556 S 1.991 1.555   1:34.10 Xorg.bin                                                                                                                      
   7308 user      20   0 1563104 223720 198584 S 1.659 3.172   0:02.08 konsole                                                                                                                       
   3532 user      20   0  566808  29864   7768 S 1.327 0.423   0:18.09 winedevice.exe                                                                                                                
   5891 user      20   0 3707380 562176 325916 S 1.327 7.970   1:17.28 firefox                                                                                                                       
   6772 user      20   0 2649904 252048 157656 S 1.327 3.573   0:08.91 Isolated Web Co                                                                                                               
   2125 user      20   0 2716208 228564 150040 S 0.995 3.240   0:54.82 kwin_x11                                                                                                                      
   2477 user      20   0 6354668 575420 213932 S 0.995 8.158   0:34.30 plasmashell                                                                                                                   
   2074 root      20   0  466948  10580   7892 S 0.664 0.150   0:09.45 udisksd                                                                                                                       
   2589 user      20   0  294828  32124  26108 S 0.664 0.455   0:07.19 ksystemstats                                                                                                                  
   3061 user      20   0  186500 102696  92120 S 0.664 1.456   0:10.60 jackdbus                                                                                                                      
    676 root      20   0       0      0      0 I 0.332 0.000   0:00.07 kworker/3:2-mm_percpu_wq                                                                                                      
   1956 user      20   0    8060   5116   2300 S 0.332 0.073   0:01.75 dbus-broker                                                                                                                   
   3062 user       9 -11 2079912 100780  95532 S 0.332 1.429   0:09.03 pulseaudio                                                                                                                    
   3063 user      20   0  247020  90508  90124 S 0.332 1.283   0:02.29 a2jmidid                                                                                                                      
   5046 root      20   0       0      0      0 I 0.332 0.000   0:01.91 kworker/u32:14-gfx                                                                                                            
   6251 user      20   0 22.949g 275884 106012 S 0.332 3.911   0:28.82 WebExtensions                                                                                                                 
   6518 root      20   0       0      0      0 I 0.332 0.000   0:00.16 kworker/2:1-events                                                                                                            
   7615 user      20   0    9748   7708   5404 R 0.332 0.109   0:00.09 top      

Any hint?

You can try akonadictl stop

There are several search results when performing a google search “kde plasma calendar reminder”.

akonadi-calendar