SSL session cache - how to clear

I am pretty sure that I saw some post saying that after setting 0 for cache size and issuing tmsh show ltm virtual virtual_name profiles { sslprofile_name } it looked like there are still entries in cache.

this is mine.

[root@ve11a:Active:In Sync] config  date; tmsh show ltm profile client-ssl myclientssl | grep -A 6 Session\ Cache
Mon Jun  1 12:16:47 SGT 2015
Session Cache
  Current Entries                                                   1
  Hits                                                              0
  Lookups                                                           1
  Overflows                                                         0
  Invalidations                                                     0

[root@ve11a:Active:In Sync] config 
[root@ve11a:Active:In Sync] config  date; tmsh modify ltm profile client-ssl myclientssl cache-size 0
Mon Jun  1 12:16:58 SGT 2015
[root@ve11a:Active:Changes Pending] config 
[root@ve11a:Active:In Sync] config  date; tmsh show ltm profile client-ssl myclientssl | grep -A 6 Session\ Cache
Mon Jun  1 12:17:03 SGT 2015
Session Cache
  Current Entries                                                   0
  Hits                                                              0
  Lookups                                                           1
  Overflows                                                         0
  Invalidations                                                     0