Performance monitoring
You can monitor Loki4j's performance by enabling an instrumentation powered by Micrometer.
First, you need to make sure that Micrometer dependency is added to your project:
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-core</artifactId>
<version>1.14.2</version>
</dependency>
implementation 'io.micrometer:micrometer-core:1.14.2'
Then, you need to enable metrics in your logback.xml:
<appender name="LOKI" class="com.github.loki4j.logback.Loki4jAppender">
...
<metricsEnabled>true</metricsEnabled>
</appender>
You will be able to monitor the following Loki4j metrics:
| Metric | Description |
|---|---|
| loki4j.append.time | Time for a single event append operation |
| loki4j.append.errors | Number of errors occurred while appending events |
| loki4j.encode.time | Time for a batch encode operation |
| loki4j.encode.events | Number of log events processed by encoder |
| loki4j.encode.batches | Number of batches processed by encoder |
| loki4j.encode.errors | Number of batches failed on encoding phase |
| loki4j.send.time | Time for a HTTP send operation |
| loki4j.send.bytes | Size of batches sent to Loki |
| loki4j.send.batches | Number of batches successfully sent to Loki |
| loki4j.send.errors | Number of batches not sent to Loki due to errors |
| loki4j.retry.errors | Number of failed attempts while sending batches to Loki |
| loki4j.drop.events | Number of events dropped due to backpressure settings |
| loki4j.unsent.events | Current number of encoded but not yet sent events |