Fix OutOfMemoryError

✅ Solution

OutOfMemoryError in Elasticsearch typically arises from excessive heap usage due to large queries, aggregations, or indexing operations. Fix this by increasing the JVM heap size (-Xms and -Xmx settings in jvm.options), optimizing query complexity (reducing aggregation size, using pagination), and controlling the indexing rate if bulk indexing is the source. Consider also using field data caching with caution, as excessive caching can also lead to OOM.