BDB: Converting mmapped files to shared memory: Need slap{cat,add}?

Dear Folks,

I have a large production 2.4.32 LDAP server slaving many trees. I set it up with memory-mapped files, and want to change it to use shared memory instead, since shared memory BDB seems to work better after watching the other servers that have been upgraded 2.3 => 2.4.32 with shared memory.

To convert this, do I need to slapcat the directories and restore them after the configuration change with slapadd, or is it sufficient to use db_recover in each LDAP database after changing the configuration while slapd is stopped?