高负载的情况下存在大量的连接，服务器可以选择拒绝来自某些ip地址的连接，或者释放占用的连接资源。

Servers can refuse to accept connections from hosts/IP addresses with an excessive number of existing connections or disconnect resource- hogging connections when suffering high load.

youdao

释放非托管资源所占用的内存。

Affranchise memory occupied by unmanaged resources.

youdao

平均释放数量并不能表示最佳性能；如果占用非常稳定，则每次收集释放的数量也可能非常稳定。

The mean amount freed is not a good performance indicator; if the occupancy is stable, the amount freed per collection will probably be pretty stable as well.

youdao