Reduce required memory per job (#6269)

Author: ktf

CMakeLists.txt

@@ -22,7 +22,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 set_property(GLOBAL PROPERTY REPORT_UNDEFINED_PROPERTIES)
 
 cmake_host_system_information(RESULT _totalmem QUERY TOTAL_PHYSICAL_MEMORY)
-math(EXPR _total_analysis_jobs "(${_totalmem}-2048)/4096")
+math(EXPR _total_analysis_jobs "(${_totalmem}-2048)/2048")
 if(_total_analysis_jobs LESS_EQUAL 0)
   set(_total_analysis_jobs 1)
 endif()