Meaning of different FS IO information from the Cluster stats?

Elastic Stack Elasticsearch
1

When I query for my cluster stats (_cluster/stats), I got the following for
Disk IO. I am not sure how to read this information. Can some one explain
how to find whether I have a disk IO issues are not based on the following
(if possible details of each key)

"fs" : {
"total" : "16672.3gb",
"total_in_bytes" : 17901746774016,
"free" : "16310.9gb",
"free_in_bytes" : 17513719939072,
"available" : "16141.5gb",
"available_in_bytes" : 17331848867840,
"disk_reads" : 132502,
"disk_writes" : 1162416974,
"disk_io_op" : 1162549476,
"disk_read_size" : "2.1gb",
"disk_read_size_in_bytes" : 2261677056,
"disk_write_size" : "24750.9gb",
"disk_write_size_in_bytes" : 26576166256640,
"disk_io_size" : "24753gb",
"disk_io_size_in_bytes" : 26578427933696,
"disk_queue" : "1.7",
"disk_service_time" : "9.8"
},

Thanks.

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2

These are stats from a point in time, so they don't really provide any
context.

Install the elastichq plugin, it'll graph these data points and give you
some context to make that decision.

Regards,
Mark Walkom

Infrastructure Engineer
Campaign Monitor
email: markw@campaignmonitor.com
web: www.campaignmonitor.com

On 24 December 2013 04:24, Search User feedworks@gmail.com wrote:

When I query for my cluster stats (_cluster/stats), I got the following
for Disk IO. I am not sure how to read this information. Can some one
explain how to find whether I have a disk IO issues are not based on the
following (if possible details of each key)

"fs" : {
"total" : "16672.3gb",
"total_in_bytes" : 17901746774016,
"free" : "16310.9gb",
"free_in_bytes" : 17513719939072,
"available" : "16141.5gb",
"available_in_bytes" : 17331848867840,
"disk_reads" : 132502,
"disk_writes" : 1162416974,
"disk_io_op" : 1162549476,
"disk_read_size" : "2.1gb",
"disk_read_size_in_bytes" : 2261677056,
"disk_write_size" : "24750.9gb",
"disk_write_size_in_bytes" : 26576166256640,
"disk_io_size" : "24753gb",
"disk_io_size_in_bytes" : 26578427933696,
"disk_queue" : "1.7",
"disk_service_time" : "9.8"
},

Thanks.

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