wy96f edited a comment on issue #2845: ARTEMIS-2336 Use zero copy to replicate journal/page/large message file (AGAIN) URL: https://github.com/apache/activemq-artemis/pull/2845#issuecomment-535797340 @franz1981 ``` 2019-09-27 13:47:01,943 DEBUG [org.apache.activemq.artemis.core.replication.ReplicationManager] sending 1048576 bytes on file 000002541.page 2019-09-27 13:47:01,943 DEBUG [org.apache.activemq.artemis.core.replication.ReplicationManager] sending 1048576 bytes on file 000002541.page 2019-09-27 13:47:01,943 DEBUG [org.apache.activemq.artemis.core.replication.ReplicationManager] sending 1048496 bytes on file 000002541.page 2019-09-27 13:47:01,945 DEBUG [org.apache.activemq.artemis.core.replication.ReplicationManager] sending 0 bytes on file 000002541.page ^C [artemis@windqpstdb05 bin]$ sar -n DEV 1 Linux 2.6.32-279.19.1.el6_sn.12.x86_64 (windqpstdb05) 09/27/2019 _x86_64_ (8 CPU) 01:47:37 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s 01:47:38 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 01:47:38 PM eth0 4548.00 2576.00 294.39 108552.23 0.00 0.00 0.00 01:47:38 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s 01:47:39 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 01:47:39 PM eth0 4520.00 2528.00 292.59 108009.43 0.00 0.00 0.00 01:47:39 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s 01:47:40 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 01:47:40 PM eth0 4497.00 2588.00 291.05 107394.71 0.00 0.00 0.00 01:47:40 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s 01:47:41 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 01:47:41 PM eth0 4483.00 2561.00 290.18 106670.38 0.00 0.00 0.00 01:47:41 PM IFACE rxpck/s txpck/s rxkB/s txkB/s rxcmp/s txcmp/s rxmcst/s 01:47:42 PM lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00 01:47:42 PM eth0 4494.00 2584.00 290.85 107486.57 0.00 0.00 0.00 ``` Yes, i saw the network was saturated(initial-replication-sync-timeout was set to 300000, otherwise replication failed due to timeout). Note that log showed `13:47:01,945` last page sent, and sar showed `01:47:37 PM` queued up data still transferring and saturating network. BTW,`<acceptor name="artemis">tcp://10.244.201.200:61616?;tcpSendBufferSize=1048576;tcpReceiveBufferSize=1048576;protocols=CORE,AMQP,STOMP,HORNETQ,MQTT,OPENWIRE;useEpoll=true;amqpCredits=1000;amqpLowCredits=300</acceptor> ` I used this in broker.xml.
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