问题描述
4000个客户端每秒发送1条消息，（ 4000/s 消息），消息报文大小500字符不到。4个消费者mqttclient 通过共享订阅方式消费数据。一段时间后emqx 日志就出现一些异常。
环境信息
- EMQ X 版本：4.2.9
- 操作系统及版本：ubuntu20.04
- 其他
详细日志
2021-04-07 09:05:34.661 [error] Process: <0.15995.0> on node 'emqx@10.10.38.112'
Context: maximum heap size reached
Max Heap Size: 8388608
Total Heap Size: 22671282
Kill: false
Error Logger: true
GC Info: [{old_heap_block_size,8912793},
{heap_block_size,13211016},
{mbuf_size,547473},
{recent_size,747483},
{stack_size,178},
{old_heap_size,3840272},
{heap_size,4210147},
{bin_vheap_size,1368235},
{bin_vheap_block_size,1618340},
{bin_old_vheap_size,3094666},
{bin_old_vheap_block_size,1347604}]
2021-04-07 09:05:38.997 [error] Process: <0.15995.0> on node 'emqx@10.10.38.112'
Context: maximum heap size reached
Max Heap Size: 8388608
Total Heap Size: 32796613
Kill: false
Error Logger: true
GC Info: [{old_heap_block_size,12834421},
{heap_block_size,19608144},
{mbuf_size,445095},
{recent_size,5604757},
{stack_size,23},
{old_heap_size,0},
{heap_size,8821746},
{bin_vheap_size,5015486},
{bin_vheap_block_size,6854964},
{bin_old_vheap_size,0},
{bin_old_vheap_block_size,2180423}]
