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This section describes some recommended performance tuning configurations to optimize the Governance Registry. It assumes that you have set up the Governance Registry on Unix/Linux, which is recommended for a production deployment. 

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OS-level settings

1. To optimize network and OS performance, configure the following settings in /etc/sysctl.conf file of Linux. These settings specify a larger port range, a more effective TCP connection timeout value, and a number of other important parameters at the OS-level.

   Info
   It is not recommended to use net.ipv4.tcp_tw_recycle = 1 when working with network address translation (NAT), such as if you are deploying products in EC2 or any other environment configured with NAT.

   Code Block
   net.ipv4.tcp_fin_timeout = 30 fs.file-max = 2097152 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_tw_reuse = 1 net.core.rmem_default = 524288 net.core.wmem_default = 524288 net.core.rmem_max = 67108864 net.core.wmem_max = 67108864 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.ipv4.ip_local_port_range = 1024 65535

2. To alter the number of allowed open files for system users, configure the following settings in /etc/security/limits.conf file of Linux (be sure to include the leading * character).

   Code Block
   * soft nofile 4096 * hard nofile 65535

   Optimal values for these parameters depend on the environment.

3. To alter the maximum number of processes your user is allowed to run at a given time, configure the following settings in  /etc/security/limits.conf file of Linux (be sure to include the leading * character). Each carbon server instance you run would require upto 1024 threads (with default thread pool configuration). Therefore, you need to increase the nproc value by 1024 per each carbon server (both hard and soft).

   Code Block
   * soft nproc 20000 * hard nproc 20000

JVM-level settings

If one or more worker nodes in a clustered deployment require access to the Management Console, increase the entity expansion limit as follows in the <G-REG_HOME>/bin/wso2server.bat file (for Windows) or the <G-REG_HOME>/bin/wso2server.sh file (for Linux/Solaris). The default entity expansion limit is 64000.

-DentityExpansionLimit=10000

WSO2 Carbon platform-level settings

1. In multi-tenant mode, the WSO2 Carbon runtime limits the thread execution time. That is, if a thread is stuck or taking a long time to process, Carbon detects such threads, interrupts and stops them. Carbon prints the current stack trace before interrupting the thread. This mechanism is implemented as an Apache Tomcat valve. Therefore, it should be configured in the <PRODUCT_HOME>/repository/conf/tomcat/catalina-server.xml file as shown below.

   Code Block
   language xml
   <Valve className="org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve" threshold="600"/>

   • The className is the Java class used for the implementation. Set it to org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.
   • The threshold gives the minimum duration in seconds after which a thread is considered stuck. The default value is 600 seconds.

2. Change the <maxActive>, <maxWait>, <validationInterval> configurations accordingly which are related to database connections in the <PRODUCT_HOME>/repository/conf/datasources/master-datasources.xml file.

   Info

   G-Reg server needs at least two database connections to startup the server. The recommended minimum database connection count is 8, the max active database count should be defined according to your requirements and the maximum database connection which can be handled with the database system. The value of the <maxActive> element should be more than the value of the <indexerPoolSize> element in the <G-REG_HOME>/repository/conf/registry.xml file

G-REG-level settings