# Esrally queries guesses of bottlenecks during pressure measurements
**URL:** https://discuss.elastic.co/t/esrally-queries-guesses-of-bottlenecks-during-pressure-measurements/342584
**Category:** Elasticsearch
**Tags:** rally
**Created:** [September 8, 2023, 7:41am UTC](https://discuss.elastic.co/t/esrally-queries-guesses-of-bottlenecks-during-pressure-measurements/342584 "2023-09-08T07:41:58Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Ceilzcx](https://discuss.elastic.co/u/Ceilzcx)
#### Post date: [September 8, 2023, 7:41am UTC](https://discuss.elastic.co/t/esrally-queries-guesses-of-bottlenecks-during-pressure-measurements/342584/1 "2023-09-08T07:41:58Z")
I use esrally. when i setting throughout to 100 or 200, the Median Throughput are about 100 or 200. but i setting throughout parm more, the mediam throughput still about 240. when i watch the monitor, the load less than 2 and cpu usage less than 40%, but the percentile latency is more bigger than before. my guess is that thread\_pool.search.size is causing the bottleneck, is right?
we use aliyun elasticsearch, can not modify thread\_pool.search.size, so I can't test my theory
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### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [September 8, 2023, 7:47am UTC](https://discuss.elastic.co/t/esrally-queries-guesses-of-bottlenecks-during-pressure-measurements/342584/2 "2023-09-08T07:47:31Z")
It sounds like you may be hitting the throughput limit at 240. Is this for bulk indexing requests or queries?
Disk I/O is often the limiting factor for Elasticsearch performance. Do you have any monitoring statistics for disk I/O, IOPS and/or disk latency?
Which version of Elasticsearch are you using? What is the size and specification of your cluster? What is the size of your data set?
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### Author:  [@Ceilzcx](https://discuss.elastic.co/u/Ceilzcx)
#### Post date: [September 8, 2023, 8:07am UTC](https://discuss.elastic.co/t/esrally-queries-guesses-of-bottlenecks-during-pressure-measurements/342584/3 "2023-09-08T08:07:26Z")
thank you for you reply. only query test pressure measurement.
es version: 7.10.2
index size: 52G 10shards
cluster setting: 4core 8G memory 3 nodes
momery and disk use about 50-60%, disk latency has no monitor
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 6, 2023, 8:08am UTC](https://discuss.elastic.co/t/esrally-queries-guesses-of-bottlenecks-during-pressure-measurements/342584/4 "2023-10-06T08:08:07Z")
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