d5005_ias_2_0_1_update2 ERROR Cannot allocate memory

I Installed the d5005_pac_ias_2_0_1_pv_dev_installer.tar.gz three month ago, It seems that the dev stack is installed successfully by check the opae software version and fme version. Then I installed the update package d5005_ias_2_0_1_update2.tar.gz, a error [Cannot allocate memory] teminated the process, How can I solve the problem? Looking forward your help as soon as possible,