This issue is fixed in 9.0.1 Fix Pack 2 via the new INI parameter described below.
Fix Details: SPR# MJON9GQHLL – Fixes potential performance degradation in LDAP search when there are many nested groups. This fix introduces the new ini: LDAP_COMPLEX_FILTER.
- When this ini is set to 1, the code path for the fix for SPR# CAHT959LQG is enabled and the performance degradation could result.
- Setting this ini to 0, disables the code path and no performance degradation will be seen.