What to do if Zookeeper resource occupies a high amount of resources on Debian

When the Zookeeper resource occupies a high level on Debian, the following measures can be taken to optimize and troubleshoot:

1. Check resource usage

• Use the top or htop command to view the memory and CPU usage of the Zookeeper process.
• Use the free -m command to view the overall memory usage of the system, including cache and buffers.

2. Analyze the reasons for high resource occupation

• Application-level bugs : such as memory leaks. Tools such as valgrind can be used to analyze application usage and locate the location of memory leaks.
• Unreasonable configuration : Check Zookeeper's configuration parameters, such as tickTime, initLimit, syncLimit, etc., to ensure that they are set reasonably according to actual needs.

3. Optimize Zookeeper configuration

• Hardware optimization : Use SSD hard disks to improve I/O performance and ensure sufficient bandwidth and low latency network connections between Zookeeper cluster nodes.
• Configuration parameter optimization :
  • tickTime: Basic time unit, default 2000 milliseconds, adjusted according to actual needs.
  • initLimit: Initial connection timeout time, default 5 * tickTime.
  • syncLimit: Synchronous timeout time, default 2 * tickTime.
  • maxClientCnxns: Limits the maximum number of connections per client.
  • autopurge.snapRetainCount and autopurge.purgeInterval: Automatically clean snapshots and transaction logs.

4. Monitoring and tuning

• Use tools such as Prometheus and Grafana to monitor key performance metrics, regularly check log files, and focus on WARN and ERROR levels of logs.

5. Adjust JVM parameters

• Adjust the size of JVM heap memory according to the actual load situation.
• Regularly clean Zookeeper's log files to reduce disk space usage and indirectly optimize memory usage.

6. Debug configuration files

• Back up the original zoo.cfg file before making any modifications.
• Use a text editor to open the zoo.cfg file and adjust the corresponding parameters according to the above suggestions.
• After modifying the configuration parameters, restart the Zookeeper service to apply the changes and perform the necessary tests to verify that the configuration works as expected.

Through the above steps, the problem of high Zookeeper resource occupancy on Debian can be effectively diagnosed and solved, and corresponding optimization measures can be taken to ensure the stable operation of the system. If the problem persists, it is recommended to consult Zookeeper's official documentation or seek community help.

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