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https://issues.apache.org/jira/browse/COUCHDB-3304?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bala Kolla resolved COUCHDB-3304.
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Resolution: Fixed
> Rollback default value of config global_change:max_write_delay to 500
> ---------------------------------------------------------------------
>
> Key: COUCHDB-3304
> URL: https://issues.apache.org/jira/browse/COUCHDB-3304
> Project: CouchDB
> Issue Type: Bug
> Components: Database Core
> Reporter: Bala Kolla
>
> This config default value has changed from 500 to 25 and it's causing a
> noticeable impact on the performance. We executed a performance test
> benchmark to simulate the load test of put_insert (create) scenario. The
> summary of the results is shown below.
> As evident in the performance test results shown below, when the
> *max_write_delay* was set to 500 then there is an improvement across all the
> metrics.
> * Throughput improved by around 10%
> * p99 is improved by around 20%
> * And similar gains in other latency metrics.
> A0 ==> Default config of 25
> A1 ==> 500.0
>
> ||global_changes-max_write_delay||bench_result||p90||p99||p999||
>
> |A0|363874|83485.6|115756|176128|
> |A1|403827|63356.4|84457.6|102221|
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