运行java程序报内存不足

服务器是centos6.5 4G内存 4Gswap  在主目录下总是产生hs_err_pid1234.log类的日志，内容如下：
#
# There is insufficient memory for the Java Runtime Environment to continue.
# pthread_getattr_np
# Possible reasons:
#   The system is out of physical RAM or swap space
#   In 32 bit mode, the process size limit was hit
# Possible solutions:
#   Reduce memory load on the system
#   Increase physical memory or swap space
#   Check if swap backing store is full
#   Use 64 bit Java on a 64 bit OS
#   Decrease Java heap size (-Xmx/-Xms)
#   Decrease number of Java threads
#   Decrease Java thread stack sizes (-Xss)
#   Set larger code cache with -XX:ReservedCodeCacheSize=
# This output file may be truncated or incomplete.
#
#  Out of Memory Error (os_linux_x86.cpp:728), pid=20631, tid=140163717150464
#
# JRE version:  (8.0_25-b17) (build )
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.25-b02 mixed mode linux-amd64 compressed oops)