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define a throttle policy at a global level.

1. Enter your user name and password to log on to the ESB Management Console.

1. Go to the Main tab.

1. In the Modules section, click List to open the Deployed

1. Modules page.

1. In the row that displays wso2throttle module, click Configure  to open the Global Throttling Configuration page.
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2. In the Enable Throttling

1.  parameter, select Yes. The existing throttle configuration will appear in the wizard as shown in the example below.
   

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   Configure the following parameters as required to update the throttle policy.

   Parameter Name	Description
   Maximum Concurrent Accesses	The maximum number of requests served concurrently by the service at any given time.
   Range	The range of IP addresses or the domain (based on the value selected for the Type parameter) to be restricted from accessing the service. Requests from these IP addresses/domains will be restricted based on the specified values.
   Type	This specifies the basis on which the clients should be restricted from accessing the proxy service. Possible values are as follows. IP: This restricts access to the service based on the IP address of the client. If you select this, enter the relevant range ofIP addresses in the Range parameter (e.g., 10.100.1.30-10.100.1.60). Domain: This restricts access to the service based on the domain of the client. If you select this, enter the relevant domain in the Range parameter (e.g., *.wso2.com).

1. Info It is recommended to use IP based throttling instead of domain based throttling since the performance overhead is minimal when IP based throttling is used. Since the use of domain based throttling results in a high performance overhead, it is not provided by default with the ESB distribution. However, it can be provided as a patch if you need to use domain based throttling.
   Max Request Count Anchor MRC MRC	This parameter specifies the maximum number of requests that should be handled within the time interval specified in the Unit Time parameter. Tip This parameter is applicable only when the value selected for the Access parameter is Control.
   Unit Time (ms) Anchor

1. UT

1. UT	The time interval for which the maximum number of requests

1. specified for the Throttle ID in the Max Request Count parameter

1. apply. Tip This parameter is applicable only when the value selected for the Access parameter is Control.
   Prohibit Time Period (ms) Anchor PTP PTP	If the number of requests entered in the Max Request Count parameter is achieved before the time interval entered in the Unit Time (ms) parameter has elapsed, no more requests are taken by the inflow throttle handler for the time period entered in this parameter. Entering a value in this parameter alters the unit time. For example: Max Request Count = 50 Unit Time = 50000 ms Prohibit Time Period = 5000 ms If 50 requests are received within 35000 milliseconds, no requests will be taken for the next 5000 milliseconds. Thus, the time slot considered as the unit time is changed to 40000 milliseconds. If no value is entered in the Prohibit Time Period (ms) parameter, no requests will be taken until 15000 more milliseconds (i.e. the remainder of the unit time) have elapsed. Tip This parameter is applicable only when the value selected for the Access parameter is Control.
   Access	This parameter is used to specify he extent to which the IP addresses/domains specified in the Range parameter are allowed access to the service to which the throttle policy is applied. Possible values are as follows. Allow: If this is selected, the specified IP addresses/domains are allowed to access the services to which the throttle ID is applied without any restrictions. Deny: If this is selected, specified IP addresses/domains are not allowed to access the services to which the throttle ID is applied. Control: If this is selected, the specified IP addresses/domains are allowed to access the services to which the throttle ID is applied. However, the number of times they can access the services is controlled by the Max Request Count , Unit Time (ms) ,and the Prohibit Time Period (ms) parameters.
   Actions	Click Delete in the relevant row to delete an entry.

<policy policyType="3">
            <policyUUID>WSO2ServiceThrottlingPolicy</policyUUID>
            <wsp:Policy xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy"
                        xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
                        wsu:Id="WSO2ServiceThrottlingPolicy">
               <throttle:ServiceThrottleAssertion xmlns:throttle="http://www.wso2.org/products/wso2commons/throttle">
                  <wsp:Policy>
                     <throttle:ID throttle:type="IP">10.100.0.37</throttle:ID>
                     <wsp:Policy>
                        <throttle:Control>
                           <wsp:Policy>
                              <throttle:MaximumCount>5</throttle:MaximumCount>
                              <throttle:UnitTime>100000</throttle:UnitTime>
                              <throttle:ProhibitTimePeriod wsp:Optional="true">10000</throttle:ProhibitTimePeriod>
                           </wsp:Policy>
                        </throttle:Control>
                     </wsp:Policy>
                  </wsp:Policy>
                  <wsp:Policy>
                     <throttle:ID throttle:type="DOMAIN">localhost</throttle:ID>
                     <wsp:Policy>
                        <throttle:Control>
                           <wsp:Policy>
                              <throttle:MaximumCount>1</throttle:MaximumCount>
                              <throttle:UnitTime>10000</throttle:UnitTime>
                              <throttle:ProhibitTimePeriod wsp:Optional="true">10000</throttle:ProhibitTimePeriod>
                           </wsp:Policy>
                        </throttle:Control>
                     </wsp:Policy>
                  </wsp:Policy>
                  <wsp:Policy>
                     <throttle:ID throttle:type="IP">127.0.0.1</throttle:ID>
                     <wsp:Policy>
                        <throttle:Control>
                           <wsp:Policy>
                              <throttle:MaximumCount>1</throttle:MaximumCount>
                              <throttle:UnitTime>100000</throttle:UnitTime>
                              <throttle:ProhibitTimePeriod wsp:Optional="true">10000</throttle:ProhibitTimePeriod>
                           </wsp:Policy>
                        </throttle:Control>
                     </wsp:Policy>
                  </wsp:Policy>
               </throttle:ServiceThrottleAssertion>
            </wsp:Policy>
         </policy>
      </policies>
      <module name="addressing" version="4.2.0" type="engagedModules"/>
      <module name="POXSecurityModule" version="4.2.2" type="engagedModules"/>
      <module name="wso2statistics" version="4.2.2" type="engagedModules"/>
      <module name="ServerAdminModule" version="4.2.0" type="engagedModules"/>
      <module name="pagination" version="4.2.0" type="engagedModules"/>
      <parameter name="serviceType" type="1">proxy</parameter>
      <policyUUID>WSO2ServiceThrottlingPolicy</policyUUID>
      <parameter name="disableREST" type="1">true</parameter>
      <module name="wso2throttle" version="4.2.0" type="engagedModules"/>
      <association destinationPath="/repository/transports/https/listener"
                   type="exposedTransports"/>
      <association destinationPath="/repository/transports/http/listener"
                   type="exposedTransports"/>
   </service>
</serviceGroup>