netdata wrote: > Do you guys see the same? because this is making zenoss slow...
Take a look at the output of "iostat 1". The most likely reason for high I/O waits in Zenoss is a storage subsystem that is overwhelmed by zenperfsnmp writing RRD files. If thats the case the best solution is to upgrade your storage system or to increase the cycle time of your zenperfsnmp daemon. Another more tricky possibility is trying to tune your disk scheduler (taken from the Linbit DRBD course I had last week): Code: Enabling the deadline scheduler works via the following command: echo deadline > /sys/block/device/queue/scheduler You may then also set the following values, which may provide additional latency benefits: ⢠Disable front merges: echo 0 > /sys/block/device/queue/iosched/front_merges ⢠Reduce read I/O deadline to 150 milliseconds (the default is 500ms): echo 150 > /sys/block/device/queue/iosched/read_expire ⢠Reduce write I/O deadline to 1500 milliseconds (the default is 3000ms): echo 1500 > /sys/block/device/queue/iosched/write_expire -------------------- m2f -------------------- Read this topic online here: http://forums.zenoss.com/viewtopic.php?p=30587#30587 -------------------- m2f --------------------
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