hologres-slow-query-analysis

Diagnose slow queries in Hologres by inspecting the hologres.hg_query_log within a specified time window to identify bottlenecks, aggregate top slow queries by digest, and surface root causes across engines. This yields actionable optimization recommendations and detailed execution plans.

Hologres query latency spikes or failures stem from execution bottlenecks across specific engines like HQE, PQE, SDK/FixedQE, or PG. Analyzing the hologres.hg_query_log surfaces these root causes, highlighting resource reads, writes, and plan details for targeted performance tuning.

Yes, you can analyze instance-wide slow query analytics by computing total counts, durations, and distributions across Hologres engines for a defined time window. This identifies peak hour spikes and aggregates query digests to propose schema or plan improvements.

Perform a per-query deep-dive on a specific Hologres query_id by inspecting its execution plan, resources, reads, writes, and engine details from the query log. This generates actionable optimization recommendations tailored to that exact query's execution profile.

Yes, Hologres query log analysis respects safety and privileges by filtering diagnostic results based on available access and documented error codes. This ensures structured instance-wide and per-query diagnostics only surface data you are authorized to inspect.