rocketmq_client.log文件占用的缓存/缓冲区内存太多

rocketmq_client日志文件实在消耗了太多cache/buffer了，我容器的jvm内存使用才500M，但是rocketmq的日志buffer/cache就消耗了2G的内存. rocketmq_client.log占用内存我勉强还可以理解， 但是为什么rollOver后的日志文件rocketmq_client.log.1，rocketmq_client.log.2 也占用了那么多内存，这两个文件已经没有任何读写了

1. rocketmq_client.log 100% cached/buffered in memory
2. rocketmq_client.log.1 100% cached/buffered in memory
3. rocketmq_client.log.2 45.9% cached/buffered in memory

[root@node135 f91415]# /usr/local/bin/vmtouch ./diff/root/logs/rocketmqlogs/rocketmq_client.log Files: 1 Directories: 0 Resident Pages: 198301/198301 774M/774M 100% Elapsed: 0.03113 seconds [root@node135 f91415]# /usr/local/bin/vmtouch ./diff/root/logs/rocketmqlogs/rocketmq_client.log.1 Files: 1 Directories: 0 Resident Pages: 262145/262145 1G/1G 100%
Elapsed: 0.042067 seconds [root@node135 f91415]# /usr/local/bin/vmtouch ./diff/root/logs/rocketmqlogs/rocketmq_client.log.2 Files: 1 Directories: 0 Resident Pages: 120207/262145 469M/1G 45.9% Elapsed: 0.020819 seconds

echo 1 > /proc/sys/vm/drop_caches;

如果我手动清除cache，那就恢复正常了，但是时间久了还是会出现同样的问题 ，cache还是会一直增长，不会有任何减少

减少log文件的buffer/cache内存占用

docker jdk image : openjdk:8 rocketmq-client : 4.3.2 os: centos7 linux-4.4

原提问者GitHub用户zhxjdwh