When I add a spike arrest policy as pasted below, to my Apigee APIs, does it count all the API calls from that client IP to Apigee to calculate whether the limit was exceeded? Or does it maintain a count per API individually and apply the policy per API/ API bundle?

```
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<SpikeArrest enabled="true" continueOnError="true" async="false" name="SpikeArrestCheck">
    <DisplayName>Spike Arrest Policy</DisplayName>
    <FaultRules/>
    <Properties/>
    <Identifier ref="proxy.client.ip"/>
    <Rate>100ps</Rate>
</SpikeArrest>

```