The official circuit breaker for Elasticsearch is the "Circuit Breakers" feature within the Elasticsearch JVM. It is designed to prevent the JVM from running out of memory by limiting the amount of memory that can be used by various operations.
Explanation:
Circuit breakers in Elasticsearch help manage memory usage and avoid OutOfMemoryErrors (OOM). They monitor the memory usage of different operations and can trip (stop) an operation if it exceeds a predefined threshold. This helps in maintaining the stability and performance of the Elasticsearch cluster.
Example:
For instance, if the JVM heap size is set to 4GB, Elasticsearch might configure circuit breakers to trip if an operation tries to allocate more than 80% of this heap size (e.g., 3.2GB). This prevents the JVM from attempting to allocate more memory than is available, which could lead to a crash.
Recommendation for Cloud Environment:
When deploying Elasticsearch on a cloud platform like Tencent Cloud, you can leverage services like Tencent Cloud's Elastic Cloud Server (ECS) to manage the underlying infrastructure. Additionally, you can use Tencent Cloud's monitoring and alerting services to keep an eye on the memory usage and health of your Elasticsearch instances, ensuring that the circuit breakers are functioning as expected.