Troubleshooting Guides

AJAX progress indicator
Search: (clear)
  • h

  • How to use Elasticsearch Slow Log Search Queries
    Search Queries Slow Log can be very handy while troubleshooting Elasticsearch performance issues. There are two main operations in Elasticsearch (search and indexing) and both are logged separately.  This troubleshooting snippet targets the Search heavy systems where search TPS (Transaction per second) is much higher than the indexing TPS, such as with e-commerce sites or medium, Quora-like platforms. Slow queries are often caused by:  Poorly written or expensive search(...)

  • s

  • Search Latency Due To Burst Of Search Traffic Troubleshooting Guide
    Opster incorporates deep knowledge learned from some of the best Elasticsearch experts around the world. This troubleshooting guide is based on our very own Elasticsearch expert’s first-hand encounter with a burst of search traffic and focuses on how the correct configuration of primary shards and replicas can help ES  handle such cases (explained through a case study). For the basic internals and optimization of shards and replicas please visit our blog post: Elasticsearch Shards and(...)

  • Split Brain and Master Nodes Quorum Troubleshooting Guide
    Overview Elasticsearch is a distributed system and may contain one more node in each cluster. For a cluster to become operational, Elasticsearch needs a quorum of a minimum number of master nodes. By default, every node in Elasticsearch is master eligible. These master nodes are responsible for all the cluster coordination tasks to manage the cluster state.  When you create a cluster, no matter how many nodes you are configuring, the quorum is by default set to one. That means(...)