IDS Response Problem

Hi All, We are using IDS10 UC5 and receiving following message in online.log. Anybody have any idea about these messages. During this time, no new client was able to connect to the database but previous connections were working fine. I will appreciate if someone can advice me regarding this. 12:39:35 Maximum server connections 123 12:42:09 shmat: [EMFILE][24]: out of shared memory segments, check system SHMSEG 12:42:09 create_tcb: cannot allocate memory 12:42:09 (5099) connection rejected - too many users, or invalid user name 12:42:09 listener-thread: err = -25571: oserr = 0: errstr = : Cannot create a user thread. 12:42:12 shmat: [EMFILE][24]: out of shared memory segments, check system SHMSEG 12:42:12 create_tcb: cannot allocate memory 12:42:12 (5100) connection rejected - too many users, or invalid user name 12:42:12 listener-thread: err = -25571: oserr = 0: errstr = : Cannot create a user thread. 12:42:18 shmat: [EMFILE][24]: out of shared memory segments, check system SHMSEG 12:42:18 create_tcb: cannot allocate memory . . . 12:42:44 (5106) connection rejected - too many users, or invalid user name 12:42:44 listener-thread: err = -25571: oserr = 0: errstr = : Cannot create a user thread. 12:42:45 shmat: [EMFILE][24]: out of shared memory segments, check system SHMSEG 12:42:46 shmat: [EMFILE][24]: out of shared memory segments, check system SHMSEG 12:42:46 create_tcb: cannot allocate memory 12:42:46 (5107) connection rejected - too many users, or invalid user name 12:42:46 listener-thread: err = -25571: oserr = 0: errstr = : Cannot create a user thread. . . . 13:17:14 1024 incomplete connections at this time. System might be under attack through invalid clients on the listener port. 13:17:24 1024 incomplete connections at this time. System might be under attack through invalid clients on the listener port. 13:17:32 1024 incomplete connections at this time. System might be under attack through invalid clients on the listener port. 13:17:35 1024 incomplete connections at this time. System might be under attack through invalid clients on the listener port. 13:17:50 Shutdown Mode 13:17:52 Checkpoint Completed: duration was 0 seconds. 13:17:52 Checkpoint loguniq 1114, logpos 0x156018, timestamp: 0x8d17cb35 13:17:52 Maximum server connections 123 13:17:53 IBM Informix Dynamic Server Stopped. 13:18:00 IBM Informix Dynamic Server Started. Regards, Navaid Arif

Navaid Arif wrote: > Hi All, > We are using IDS10 UC5 and receiving following message in > online.log. Anybody have any idea about these messages. During this > time, no new client was able to connect to the database but previous > connections were working fine. I will appreciate if someone can advice > me regarding this. > > 12:39:35 Maximum server connections 123 > 12:42:09 shmat: [EMFILE][24]: out of shared memory segments, > check system SHMSEG > 12:42:09 create_tcb: cannot allocate memory > 12:42:09 (5099) connection rejected - too many users, or invalid > user name > 12:42:09 listener-thread: err = -25571: oserr = 0: errstr = : > Cannot create a user thread. > 12:42:12 shmat: [EMFILE][24]: out of shared memory segments, > check system SHMSEG > 12:42:12 create_tcb: cannot allocate memory > 12:42:12 (5100) connection rejected - too many users, or invalid > user name > 12:42:12 listener-thread: err = -25571: oserr = 0: errstr = : > Cannot create a user thread. > 12:42:18 shmat: [EMFILE][24]: out of shared memory segments, > check system SHMSEG > 12:42:18 create_tcb: cannot allocate memory > . > . > . > 12:42:44 (5106) connection rejected - too many users, or > invalid user name > 12:42:44 listener-thread: err = -25571: oserr = 0: errstr = : > Cannot create a user thread. > 12:42:45 shmat: [EMFILE][24]: out of shared memory segments, > check system SHMSEG > 12:42:46 shmat: [EMFILE][24]: out of shared memory segments, > check system SHMSEG > 12:42:46 create_tcb: cannot allocate memory > 12:42:46 (5107) connection rejected - too many users, or > invalid user name > 12:42:46 listener-thread: err = -25571: oserr = 0: errstr = : > Cannot create a user thread. > . > . > . > 13:17:14 1024 incomplete connections at this time. System > might be under attack through > invalid clients on the listener port. > 13:17:24 1024 incomplete connections at this time. System > might be under attack through > invalid clients on the listener port. > 13:17:32 1024 incomplete connections at this time. System > might be under attack through > invalid clients on the listener port. > 13:17:35 1024 incomplete connections at this time. System > might be under attack through > invalid clients on the listener port. > 13:17:50 Shutdown Mode > 13:17:52 Checkpoint Completed: duration was 0 seconds. > 13:17:52 Checkpoint loguniq 1114, logpos 0x156018, timestamp: > 0x8d17cb35 > > 13:17:52 Maximum server connections 123 > 13:17:53 IBM Informix Dynamic Server Stopped. > > 13:18:00 IBM Informix Dynamic Server Started. > > Regards, > *Navaid Arif* Apparently it ran out of memory. Since you're using UC5 check this: http://www-03.ibm.com/developerworks/blogs/page/gbowerman?entry=undocumented_performance_feature_in_ids Did you change your system recently? If this isn't the case, try to figure out where the memory is going... onstat can help. Regards. -- Fernando Nunes Portugal http://informix-technology.blogspot.com My email works... but I don't check it frequently...

It's just a wild, wild guess, but could you possibly have run out of shared memory segments? Could it be worth your while checking the value of SHMSEG? Suggested settings on UNIX/Linux kernel parameners can be found in a sub-directory of $INFORMIXDIR/release -- Neil Truby t:01932 724027 Director m:07798 811708 Ardenta Limited e:neil.truby@ardenta.com "Navaid Arif" <navaid.arif@access.net.pk> wrote in message news:mailman.379.1183735599.13675.informix-list@iiug.org... Hi All, We are using IDS10 UC5 and receiving following message in online.log. Anybody have any idea about these messages. During this time, no new client was able to connect to the database but previous connections were working fine. I will appreciate if someone can advice me regarding this. 12:39:35 Maximum server connections 123 12:42:09 shmat: [EMFILE][24]: out of shared memory segments, check system SHMSEG 12:42:09 create_tcb: cannot allocate memory 12:42:09 (5099) connection rejected - too many users, or invalid user name 12:42:09 listener-thread: err = -25571: oserr = 0: errstr = : Cannot create a user thread. 12:42:12 shmat: [EMFILE][24]: out of shared memory segments, check system SHMSEG 12:42:12 create_tcb: cannot allocate memory 12:42:12 (5100) connection rejected - too many users, or invalid user name 12:42:12 listener-thread: err = -25571: oserr = 0: errstr = : Cannot create a user thread. 12:42:18 shmat: [EMFILE][24]: out of shared memory segments, check system SHMSEG 12:42:18 create_tcb: cannot allocate memory . . . 12:42:44 (5106) connection rejected - too many users, or invalid user name 12:42:44 listener-thread: err = -25571: oserr = 0: errstr = : Cannot createa user thread. 12:42:45 shmat: [EMFILE][24]: out of shared memory segments, check systemSHMSEG 12:42:46 shmat: [EMFILE][24]: out of shared memory segments, check systemSHMSEG 12:42:46 create_tcb: cannot allocate memory 12:42:46 (5107) connection rejected - too many users, or invalid user name 12:42:46 listener-thread: err = -25571: oserr = 0: errstr = : Cannot createa user thread. . . . 13:17:14 1024 incomplete connections at this time. System might be underattack through invalid clients on the listener port. 13:17:24 1024 incomplete connections at this time. System might be underattack through invalid clients on the listener port. 13:17:32 1024 incomplete connections at this time. System might be underattack through invalid clients on the listener port. 13:17:35 1024 incomplete connections at this time. System might be underattack through invalid clients on the listener port. 13:17:50 Shutdown Mode 13:17:52 Checkpoint Completed: duration was 0 seconds. 13:17:52 Checkpoint loguniq 1114, logpos 0x156018, timestamp: 0x8d17cb35 13:17:52 Maximum server connections 123 13:17:53 IBM Informix Dynamic Server Stopped. 13:18:00 IBM Informix Dynamic Server Started. Regards,Navaid Arif