C:\MIX\firebird\QA\fbt-repo>isql /3255:e25
Database: /3255:e25, User: SYSDBA
SQL> show version;
ISQL Version: WI-V3.0.0.32320 Firebird 3.0 Release Candidate 2
Server version:
Firebird/Windows/Intel/i386 (access method), version "WI-V2.5.6.26969 Firebird 2.5"
Firebird/Windows/Intel/i386 (remote server), version "WI-V2.5.6.26969 Firebird 2.5/tcp (csprog)/P12"
Firebird/Windows/Intel/i386 (remote interface), version "WI-V3.0.0.32320 Firebird 3.0 Release Candidate 2/tcp (csprog)/P12"
on disk structure version 11.2

SQL> set list on;
SQL> select current_connection from rdb$database;

CURRENT_CONNECTION              3


SQL> select * from mon$attachments;

MON$ATTACHMENT_ID               3
MON$SERVER_PID                  952
MON$STATE                       1
MON$ATTACHMENT_NAME             e25
MON$USER                        SYSDBA
MON$ROLE                        NONE
MON$REMOTE_PROTOCOL             TCPv4
MON$REMOTE_ADDRESS              192.168.43.154
MON$REMOTE_PID                  1684
MON$CHARACTER_SET_ID            0
MON$TIMESTAMP                   2016-02-04 19:21:22.0790
MON$GARBAGE_COLLECTION          1
MON$REMOTE_PROCESS              C:\MIX\Firebird\fb30\isql.exe
MON$STAT_ID                     2

MON$ATTACHMENT_ID               4
MON$SERVER_PID                  952
MON$STATE                       0
MON$ATTACHMENT_NAME             e25
MON$USER                        SYSDBA
MON$ROLE                        NONE
MON$REMOTE_PROTOCOL             TCPv4
MON$REMOTE_ADDRESS              192.168.43.154
MON$REMOTE_PID                  5360
MON$CHARACTER_SET_ID            0
MON$TIMESTAMP                   2016-02-04 19:21:33.7980
MON$GARBAGE_COLLECTION          1
MON$REMOTE_PROCESS              C:\MIX\Firebird\fb30\isql.exe
MON$STAT_ID                     6


SQL> commit; set count on; delete from mon$attachments; commit;
Records affected: 2

SQL> select * from mon$attachments;

MON$ATTACHMENT_ID               3
MON$SERVER_PID                  952
MON$STATE                       1
MON$ATTACHMENT_NAME             e25
MON$USER                        SYSDBA
MON$ROLE                        NONE
MON$REMOTE_PROTOCOL             TCPv4
MON$REMOTE_ADDRESS              192.168.43.154
MON$REMOTE_PID                  1684
MON$CHARACTER_SET_ID            0
MON$TIMESTAMP                   2016-02-04 19:21:22.0790
MON$GARBAGE_COLLECTION          1
MON$REMOTE_PROCESS              C:\MIX\Firebird\fb30\isql.exe
MON$STAT_ID                     2


Records affected: 1
SQL> select current_connection from rdb$database;

CURRENT_CONNECTION              3

Records affected: 1
SQL>