title: How to perform multiple HTTP DELETE operation on same Resource with different IDs in JMeter?
body: <br/>
  I have a question regarding **writing test for HTTP DELETE method in JMeter using Concurrency Thread Group**. I want to measure **how many DELETEs** can it perform in certain amount of time for certain amount of Users (i.e. Threads) who are sending Concurrent HTTP (DELETE) Requests.
  <p><em>Concurrency Thread Group parameters</em> are:<br/>
  <strong>Target Concurrency</strong>: 50 (Threads)<br/>
  <strong>RampUp Time</strong>: 10 secs<br/>
  <strong>RampUp Steps Count</strong>: 5 secs<br/>
  <strong>Hold Target Rate Time (sec)</strong>: 5 secs<br/>
  <strong>Threads Iterations Limit</strong>: infinite<br/></p>
  <p>The thing is that HTTP DELETE is idempotent operation i.e. if inovked on same resource (i.e. Record in database) it kind of doesn't make much sense. How can I achieve deletion of multiple EXISTING records in database by passing Entity's ID in URL? E.g.:</p>
  <p><code>http://localhost:8080/api/authors/{id}</code></p>
  <p>...where ID is being incremented for each User (i.e. Thread)?
  My question is how can I automate deletion of multiple EXISTING rows in database (<strong>Postgres 11.8</strong>)...should I write <strong>some sort of script</strong> or is there other <strong>easier way</strong> to achieve that?
  But again I guess it will probably perform multiple times same thing on same resources ID (e.g. HTTP DELETE will be invoked more than once on <code>http://localhost:8080/api/authors/5</code>).
  <br/>
  Any help/advice is greatly appreciated.</p>
  <p><strong>P.S.</strong> I'm doing this to performance test my SpringBoot, Vert.X and Dropwizard RESTful Web service apps.</p>
  <p><strong>UPDATE1</strong>:<br/>
  Sorry, I've didn't fully specify reason for writing these Test Use Case for my Web Service apps which communicate with Postgres DB. <strong>MAIN reason</strong> why I'm actually doing this testing is to test <strong>PERFORMANCES of blocking and NON-blocking WEB Server implementations</strong> for mentioned frameworks (SpringBoot, Dropwizard and Vert.X). Web servers are:</p>
  <ol>
  <li><strong>Blocking</strong> impelementations:<br/>
  1.1. <em>Apache Tomcat</em> (SpringBoot)<br/>
  1.2. <em>Jetty</em> (Dropwizard)<br/></li>
  <li><strong>Non-blocking</strong>: Vert.X (uses own implementation based on <strong>Netty</strong>)</li>
  </ol>
  <p>If I am using <a href="https://jmeter.apache.org/usermanual/component_reference.html#JDBC_Request" rel="nofollow noreferrer">JMeter's JDBC Request</a> in my Test Plan won't that actually <strong>slow down</strong> Test execution?</p>