too much virtual memery usage

[PikuZheng]

📑 I have found these related issues/pull requests

it looks like #3788 and #5568 but not exactly the same

🛡️ Security Policy

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Description

I often encounter the web interface fails to load or shows a blank screen as described in #5568 (comment) .
I noticed that this issue is exacerbated when disk performance is slow. after some investigation, I think it has something to do with memory consumption. uptime-kuma uses about 0.7G physical memory, but uses a lot of virtual memory.
Since no frequent disk reads and writes were found, I think there may be a potential memory consumption problem or memory leak.

here I take Server1 as an example (about 99 ping monitors):

  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
13429 13407 root     S    21.3g5067%   1   0% node server/server.js

after restart

37099 37077 root     S    11.3g2691%   0  12% node server/server.js

same issues also exist in other servers:

  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
20825 20813 root     S    21.3g 555%   1   1% node server/server.js

  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
 2870  2846 root     S    11.3g 295%   1   0% node server/server.js

the best case is with 5 monitors and 1.23.13 with sqlite, but still consumes a lot of memory:

  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
 3960  3922 root     S    10.9g 285%   1   4% node server/server.js
localhost:~# uptime
 11:38:06 up 49 days, 23:13,  0 users,  load average: 0.12, 0.08, 0.02

after restart:

  PID  PPID USER     STAT   VSZ %VSZ CPU %CPU COMMAND
30120 30103 root     S    1001m  25%   1   2% node server/server.js

👟 Reproduction steps

run it in a VM with 4GB of RAM and wait

👀 Expected behavior

expected memory usage is stable

😓 Actual Behavior

memory usage grows till web ui slow

🐻 Uptime-Kuma Version

both 2.0.0 and 1.23.13

💻 Operating System and Arch

official container

🌐 Browser

Chrome 133.0.6943.127

🖥️ Deployment Environment

• Runtime: docker standalone 26.1.5
• Database: embedded mariadb
• Filesystem used to store the database on: ext4
• number of monitors: 99

📝 Relevant log output