olcPcacheAttrset/olcPcacheTemplate values for set acl

I'm trying to write ACL, using set entries, like this: to * by set="[cn=remote group,dc=host]/member & user" write, where cn=remote group,dc=host is a remote group, available via ldap-proxy. The remote group looks like this: dn: cn=remote group,dc=host cn: remote member: cn=user1,ou=users,dc=host member: cn=user2,ou=users,dc=host objectClass: group

It works fine, except it raises search query to remote ldap server each time, I'm trying to search against objects, the ACL applies. Is it possible to set up pcache overlay to handle such kind of requests to speed up ACL processing? Which values olcPcacheAttrset and olcPcacheTemplate attributes should have?