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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello again, We had a 3.1.5 node exhaust the 65K FDs allocated to MQ and I’m wondering what consumes and holds the FDs. I know from the list that each connection will eat an FD and each queue will consume one or more descriptors. However at the time of the alarm we only had 8K connections and 5K queues. That wouldn’t account for 65K FDs though. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Lsof shows that there are of 50K handles consumed with references to the transient message store, e.g. “msg_store_transient/352.rdq”. There are about 30M messages queued up and the devs said that most of them are marked for persistence now (only about 2K unacked). Are these messages responsible for holding open so many FDs? There isn’t any memory or disk space pressure (7GB of 32GB memory used). Would disabling acknowledgements help to reduce the FD usage?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you!<o:p></o:p></p></div></body></html>