Understanding merge statistics from Marvel


(None) #1

Running Elasticsearch 1.2.1 with Java 1.7_55 on CentOs 6.5

The machine is a 32 core 96GB with standard spinning disk, but I also
installed 1 Samsung Evo 840 for testing ES.
The Evo is rated at 500MB/s though the Linux perf test reported about
300MB/s read and about 250MB/s write. The board is SataII which explains
why it's 300MB/s max.

Using Jmeter to send index requests to ES

Executing about 6200 puts/s

Marvel reports
2200 IOPS/
20MB merges/s

And iostat for the drive

sdf 0.00 14214.00 0.00 2021.33 0.00 62.35 63.17
10.49 5.17 0.48 97.27

Also seeing on the console: stop throttling indexing: numMergesInFlight=4,
maxNumMerges=5

Are these numbers good?

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(None) #2

I know benchmarking is a tough subject! But what do those number mean?

On Friday, 6 June 2014 12:17:22 UTC-4, John Smith wrote:

Running Elasticsearch 1.2.1 with Java 1.7_55 on CentOs 6.5

The machine is a 32 core 96GB with standard spinning disk, but I also
installed 1 Samsung Evo 840 for testing ES.
The Evo is rated at 500MB/s though the Linux perf test reported about
300MB/s read and about 250MB/s write. The board is SataII which explains
why it's 300MB/s max.

Using Jmeter to send index requests to ES

Executing about 6200 puts/s

Marvel reports
2200 IOPS/
20MB merges/s

And iostat for the drive

sdf 0.00 14214.00 0.00 2021.33 0.00 62.35 63.17
10.49 5.17 0.48 97.27

Also seeing on the console: stop throttling indexing:
numMergesInFlight=4, maxNumMerges=5

Are these numbers good?

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To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/c0106a80-2520-4ea2-8b7b-f587a87cd610%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.


(system) #3