Hello @hellojukay and welcome back! 
Could you please provide some additional details to assist us in troubleshooting your issue?
- What version of Jenkins are you currently using?
- Could you specify your operating system?
- Which JVM are you running Jenkins with?
Furthermore, if you could share a list of the plugins you have installed, it would be very helpful.
Lastly, do you have access to a more detailed memory occupation chart that could provide insights into how this memory is being utilized?
Your response will greatly assist us in diagnosing and resolving your concern. Thank you!