Answers: <p>I'm pretty sure this <a href="https://www.jenkins.io/doc/book/managing/system-properties/#hudson-util-ringbufferloghandler-defaultsize" rel="nofollow noreferrer">Jenkins system property</a> will do the trick:</p>
  <blockquote>
  <pre><code>hudson.util.RingBufferLogHandler.defaultSize
  </code></pre>
  <p>tuning</p>
  <p>Since: 1.563</p>
  <p>Default:  256</p>
  <p><strong>Description:</strong> Number of log entries in loggers available on the UI at /log/</p>
  </blockquote>
  <p>You can also custom <a href="https://support.cloudbees.com/hc/en-us/articles/115002626172-Configure-Loggers-for-Jenkins" rel="nofollow noreferrer">Configure Loggers for Jenkins</a> or <a href="https://support.cloudbees.com/hc/en-us/articles/204880580-How-do-I-create-a-logger-in-Jenkins-for-troubleshooting-and-diagnostic-information-" rel="nofollow noreferrer">create a logger in Jenkins for troubleshooting and diagnostic information</a> that capture specifics you are looking for.</p>
  <p>Additional references:<br>
  <a href="https://wiki.jenkins.io/display/JENKINS/Logging" rel="nofollow noreferrer">JENKINS - Logging</a><br>
  <a href="https://wiki.jenkins.io/display/JENKINS/Logger+Configuration" rel="nofollow noreferrer">JENKINS - Logger Configuration</a></p>
  <p>Or, if you are the admin, you should be able simply to scan the logs on the filesystem. Review what log rotation options and retention you may have.</p>
  
Answers: CC BY-SA 4.0
Answers: 2022-07-24T22:55:01.133Z
Answers: If you're using Helm: `controller: javaOpts: - "-Dhudson.util.RingBufferLogHandler.defaultSize=4096"
Answers: jws
Answers: CC BY-SA 4.0
Answers: 2020-10-10T07:09:34.933Z
Answers: 2020-10-10T07:35:23.503Z
Answers: 2020-10-10T07:35:23.503Z
Answers: Ian W
Body: <p>I use Jenkins log recorders as described in docs:
  <a href="https://www.jenkins.io/doc/book/system-administration/viewing-logs/" rel="nofollow noreferrer">https://www.jenkins.io/doc/book/system-administration/viewing-logs/</a><br />
  It works, but log is only about 255 lines long, which is too short for my processing.<br />
  Newest lines are shown, I cant reach older logs, so I dont know what happened in the beginning.<br />
  How do I increase this size? I would like to keep at least 1MB of data.</p>
  
Tags: <jenkins><logging>
Title: How to increase jenkins logger size?
UserDisplayName: michalreon
ThreadText: # How to increase jenkins logger size?
  
  (Asked by: username_0 on 2020-10-07)
  
  I use Jenkins log recorders as described in docs:
  <https://www.jenkins.io/doc/book/system-administration/viewing-logs/>  
  It works, but log is only about 255 lines long, which is too short for my processing.  
  Newest lines are shown, I cant reach older logs, so I dont know what happened in the beginning.  
  How do I increase this size? I would like to keep at least 1MB of data.
  
  **Tags:** jenkins, logging
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2020-10-10. Score: 3 | Accepted answer
  
  I'm pretty sure this [Jenkins system property](https://www.jenkins.io/doc/book/managing/system-properties/#hudson-util-ringbufferloghandler-defaultsize) will do the trick:
  
  > ```
  > hudson.util.RingBufferLogHandler.defaultSize
  >
  > ```
  >
  > tuning
  >
  > Since: 1.563
  >
  > Default: 256
  >
  > **Description:** Number of log entries in loggers available on the UI at /log/
  
  You can also custom [Configure Loggers for Jenkins](https://support.cloudbees.com/hc/en-us/articles/115002626172-Configure-Loggers-for-Jenkins) or [create a logger in Jenkins for troubleshooting and diagnostic information](https://support.cloudbees.com/hc/en-us/articles/204880580-How-do-I-create-a-logger-in-Jenkins-for-troubleshooting-and-diagnostic-information-) that capture specifics you are looking for.
  
  Additional references:  
  [JENKINS - Logging](https://wiki.jenkins.io/display/JENKINS/Logging)  
  [JENKINS - Logger Configuration](https://wiki.jenkins.io/display/JENKINS/Logger+Configuration)
  
  Or, if you are the admin, you should be able simply to scan the logs on the filesystem. Review what log rotation options and retention you may have.
  
  > **Comments:**
  > **username_2**: If you're using Helm: `controller: javaOpts: - "-Dhudson.util.RingBufferLogHandler.defaultSize=4096"  
  
  ---
  
  