Abstract: In multicore system, system execution efficiency presently has gottn increasing concerns. Generally, a whole system includes several modules and some optimization work has been done on these modules. Given an integrated system including Tomcat, Httpd and Lucene, each of them has processed some optimization to reach the favorable performance. However, when they constitute an integrated system, the system can not have good performance. Based on the deep research for the characteristic of each subtask in the system, several parallel ways are presented to improve the whole execution efficiency. The proposed methods involve: 1) Cancelling the lock of shared object or files; 2) Rearranging subtask; 3) Removing the system call from the multi-thread operation. Experimental results show that the whole performance gets improved and each function the subtask focuses on is more distinct.