Daniel, understood, I checked by state and it is OK: # kamctl fifo dlg_list |grep 'state:: 4' |wc -l 121 # kamctl fifo get_statistics dialog: dialog:active_dialogs = 122 dialog:early_dialogs = 0 dialog:expired_dialogs = 280 dialog:failed_dialogs = 33181 dialog:processed_dialogs = 378572 Thanks and regards, Takeshi. Obs: for reference for other that might need to check this: /* states of a dialog */ #define DLG_STATE_UNCONFIRMED 1 /*!< unconfirmed dialog */ #define DLG_STATE_EARLY 2 /*!< early dialog */ #define DLG_STATE_CONFIRMED_NA 3 /*!< confirmed dialog without a ACK yet */ #define DLG_STATE_CONFIRMED 4 /*!< confirmed dialog */ #define DLG_STATE_DELETED 5 /*!< deleted dialog */ From: kamailio-4.1/modules/dialog/dlg_hash.h On Fri, Feb 6, 2015 at 7:04 PM, Daniel-Constantin Mierla &lt;miconda(a)gmail.com <mailto:miconda@gmail.com>> wrote: Hello, look at the details of the dialogs, some of them might be in terminated state and therefore no longer in actitive_dialog counter. The ones in terminated state should be removed from dlg_list with the next cleanup timer. Cheers, Daniel On 06/02/15 08:59, mayamatakeshi wrote: -- Daniel-Constantin Mierla http://twitter.com/#!/miconda <http://twitter.com/#%21/miconda> - http://www.linkedin.com/in/miconda Kamailio World Conference, May 27-29, 2015 Berlin, Germany - http://www.kamailioworld.com _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org <mailto:sr-users@lists.sip-router.org> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users