Installation and Upgrade > Installing and Configuring PTC FlexPLM > Minimum Memory Configuration Settings
  
Minimum Memory Configuration Settings
Be sure that the following settings are set to the suggested value or higher.
Windchill DS
Set the PTCLdap_lde.conf file to a size limit of 1000 or higher, depending on the total number of users in the system.
Windchill
The wt.manager.cmd.MethodServer.java.command -Xmx memory setting in the wt.properties file must be a minimum of 512.
OS Level
Virus scanning programs degrade performance. It is recommended that you turn off on directories owned by the application.
Oracle
These are the suggested minimum settings on a production machine. Development environments typically use out‑of‑the‑box settings.
Issue the following commands as the DBA user:
alter system set shared_pool_size=200M;

alter system set db_cache_size=256M;

alter system set pga_aggregate_target=100000000;
These changes can be made without stopping the database.