[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Tracing](./puppeteer.protocol.tracing.md) > [BufferUsageEvent](./puppeteer.protocol.tracing.bufferusageevent.md) ## Protocol.Tracing.BufferUsageEvent interface Signature: ```typescript export interface BufferUsageEvent ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [eventCount](./puppeteer.protocol.tracing.bufferusageevent.eventcount.md) | number | An approximate number of events in the trace log. | | [percentFull](./puppeteer.protocol.tracing.bufferusageevent.percentfull.md) | number | A number in range \[0..1\] that indicates the used size of event buffer as a fraction of its total size. | | [value](./puppeteer.protocol.tracing.bufferusageevent.value.md) | number | A number in range \[0..1\] that indicates the used size of event buffer as a fraction of its total size. |