使用ulimit -v命令可以设置进程占用的VSZ少，但是对RSS还是会不断增长

提示1

2.0.50更新

core_output_filter: Fix bug that could result in sending

     garbage over the network when module handlers construct

     bucket brigades containing multiple file buckets all referencing

     the same open file descriptor. [Bojan Smojver]

提示2

core_output_filter: Fix bug that could result in sending garbage over the network when module handlers construct bucket brigades containing multiple file buckets all referencing the same open file descriptor. [Bojan Smojver]当模板处理函数构造桶队列时，队列包含的桶都引用同一个打开文件描述符，则会发送垃圾数据。此问题已经解决。

提示3

*) core_output_filter: don't split the brigade after a FLUSH bucket if it's the last bucket.  This prevents creating unneccessary empty
brigades which may not be destroyed until the end of a keepalive connection.
[Juan Rivera <Juan.Rivera citrix.com>]

提示4

  *) Fix memory leak in core_output_filter.  [Justin Erenkrantz]

提示5

  *) Fix some bucket memory leaks in the chunking code
[Joe Schaefer <joe+apache sunstarsys.com>]

提示6

*) Add buffering in core_output_filter to ensure that long
lists of small buckets don't cause small packet writes.
[Brian Pane, Ryan Bloom]

提示7

  *) Add support for partial writes with apr_sendfile() to core_output_filter.
[Greg Ames]

提示8

  *) Back out the change that moved the brigade from the core_output_filters ctx to the conn_rec.  Since all requests over a given connection
go through the same core_output_filter, the ctx pointer has the correct lifetime.回滚修改，对core_output_filters ctx内的桶移动到conn_rec内进行恢复。因为在给定连接上的请求会通过同样的core_output_filter，ctx指针有正确的生命周期
[Ryan Bloom]