worker 内存占用一直在增长

运行一段时间后，发现服务器内存占满了
看监控发现从重启后，内存一直在增长

排查发现，worker 占用内存 77%，是否存在内存泄漏问题或哪里配置要注意的？

Start by reproducing the reported memory growth in the worker after a restart and compare its usage with the monitoring screenshots and runtime configuration. Determine whether the increase is a leak or an expected configuration effect, then document a reproducible cause and verify that worker memory remains bounded after the fix.

Written by the indexing model from the issue text.