Hi Gary, I think it will be tricky to translate read rates to qps based on doc sizes. If I¹m correct, transfer between D and E is compressed tree data. Reading from disk is even more complex, since the tree data is completely dissected into strings and structural info. I¹m afraid you are best off literally keeping count somehow, or for instance analyzing access logs..
Cheers, Geert On 6/16/16, 4:25 AM, "general-boun...@developer.marklogic.com on behalf of Gary Russo" <general-boun...@developer.marklogic.com on behalf of garyru...@hotmail.com> wrote: >I'd like to measure the read query capacity of an existing cluster using >the Monitoring History Tool. > >My objective is to determine the average "Read Queries Per Second" during >a spurt of query activity. > >My plan is to use the "Query Read Rate" from the Disk I/O graph. > >Here's the info: >http://docs.marklogic.com/guide/monitoring/history#id_21175 > >I ran some JMeter scripts to measure the average request response time >which >was .74 seconds. > >During this time, I saw the following Disk I/O and Memory I/O metrics. > >Disk I/O >Query Read Rate 00.03 MB/sec >Merge Read Rate 28.00 MB/sec > >Memory I/O >Page-In Rate: 22,436.3 pages/sec >Page-Out Rate: 19,345.8 pages/sec > >How does this translate to Queries Per Second (QPS)? > >The average document (fragment) size is 4 KB (4096 bytes). > >The Query Read Rate is .03 MB/sec (30720 bytes/sec) > >Since each query returns a 4K document then 30720 divided by 4096 is 7.5 >QPS. > >If each query returned just a 1024 byte search snippet then it would be 30 >QPS. > >So I assume my answer QPS rates are: > - 7.5 QPS when returning documents > - 30.0 QPS when returning search snippets > > >Please let me know if I'm missing something. > > > >Gary Russo >NoSQL Architect and Developer >http://garyrusso.wordpress.com >http://twitter.com/garyprusso > >_______________________________________________ >General mailing list >General@developer.marklogic.com >Manage your subscription at: >http://developer.marklogic.com/mailman/listinfo/general _______________________________________________ General mailing list General@developer.marklogic.com Manage your subscription at: http://developer.marklogic.com/mailman/listinfo/general
