title: Sudden increase of response time in Jmeter
body: <p>I run some load tests using Jmeter.</p>
  
  <p>and found out unexpected increase of response time at the end of each test plan.
  Just before the end of the test plan(duration 20 minutes), the response time increased all of sudden.</p>
  
  <p>It occurred again when I run same test plan with different duration(duration 30 minutes). and latency is almost the same as response times, that seems no problem on network. </p>
  
  <p>I'm very curious why the response time increased even when the number of threads are decreasing. Could you guess what the reason is?</p>
  
  <p>Thank you in advance.</p>
  
  <p><a href="https://i.stack.imgur.com/PLbnC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PLbnC.png" alt="duration:20 minutes"></a>
  <a href="https://i.stack.imgur.com/Ew9El.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Ew9El.png" alt="duration: 30 mitues"></a></p>