hi, all: Oracle database , 20000 users, and Simultaneous-Use := 1 ; but simul_verify_query is not enough fast ... (I have tow BAS, load-balance, some users fast switch between both...) [radius@RADSERVER1 radius]$ gdb radiusd -f core.27318 . . . Reading symbols from /usr/local/lib/rlm_detail-2.1.8.so...done. Loaded symbols for /usr/local/lib/rlm_detail-2.1.8.so #0 request_pre_handler (request=0x2a98f39310) at event.c:1763 /home/radius/fzw/freeradius-server-2.1.8/src/main/event.c:1763:44023:beg:0x420e66 (gdb)