性能監控工具 PerfMonger 0.5.0 發布

PerfMonger又是一個性能監視工具。 PerfMonger監視對象是類似于SYSSTAT（CPU利用率，IO的用途等）的那些，但PerfMonger可以收集和報告性能信息非常頻繁（SYSSTAT的報告間隔時間為1秒的最小數目，但PerfMonger可以使用小得多，例如間隔0.5秒或0.01秒），可以在人類可讀和機器可讀的格式顯示性能信息。

發布說明：本次發布的重點是提高可用性. The newly added 'summary' subcommand is very useful for summarizing recorded perfmonger log files. It also has many other improvements and bugfixes, including support for Ruby 1.8.7 (only Ruby 1.9/2.0 were supported before). PerfMonger is available on yum repository as of this release。