Slow searches, high CPU on data nodes, cluster instability, or a mapping that's impossible to change — Elasticsearch problems usually come back to queries, mappings and shard strategy.
I review your queries, mappings, index settings and shard layout, and fix what's actually expensive for your data and query patterns.
Optimize Elasticsearch queries, mappings, indices and cluster configuration.
Tuned Elasticsearch for Cenoskop's product search — reduced aggregation query time from 8s to 400ms by redesigning the mapping (switching from analyzed text to keyword for faceted search), adjusting shard size, and rewriting aggregation queries to use filters instead of query context.
You export cluster state, mappings, representative slow queries (with profile API output) and node stats. I analyze the query patterns, mapping choices, shard layout and resource usage, then propose specific fixes. Most engagements take one to two days.
Profiling and a written set of prioritized recommendations. Implementation of changes is quoted separately.
Most mapping changes (analyzers, field types, disabled norms) require a reindex into a new index. I'll flag which fixes are live and which need a reindex window.
GET _cluster/stats, GET _nodes/hot_threads, the slow search log, and the profile API output for a few representative slow queries, plus the relevant mapping.
Other problems I help with.
Tune Elasticsearch for your specific query and data patterns.
Details →Implement Elasticsearch for search, analytics and indexing.
Details →Migrate to or upgrade Elasticsearch with minimal downtime.
Details →Find and prioritize the real bottlenecks across your full backend stack.
Details →Relevant production work.
Crawler monitoring millions of products. Processing 30M products daily and comparing them.
Built and maintain the full crawling pipeline — from scraping through Elasticsearch indexing to price comparison.
Price intelligence engine for the US market. Processing large-scale product data.
Built the data pipeline and crawling infrastructure for large-scale US product monitoring.
Describe the problem in a few lines — I'll look at it and tell you what I think.