Developed a memory-aware Hybrid Cardinality Collector for the wazuh-indexer repository, enabling efficient handling of high-cardinality queries by dynamically switching between the Ordinals Collector and DirectCollector based on memory usage. This approach preserved previously computed aggregations, reducing recomputation and improving search throughput and latency for complex queries. Authored comprehensive user documentation and configuration guidance for the hybrid collector in the opensearch-project/documentation-website repository, facilitating straightforward adoption by end users. The work involved backend development and data aggregation using Java and Markdown, with updated unit tests to ensure stability and regression safety, demonstrating a focus on performance optimization and technical writing.