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Query Optimization & Performance Tuning

EXPLAIN ANALYZE, index optimization, query rewriting. 10-100x speedup.

SERVICE DETAILS

I analyze slow queries using EXPLAIN ANALYZE, identify bottlenecks (full table scans, N+1 queries, missing indexes), rewrite queries for better performance, implement caching strategies, and benchmark improvements.

> INVESTMENT:

from €1,200
const module = new ExecutionProtocol();

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Key Benefits

Query analysis with EXPLAIN ANALYZE—understand query execution plans.

Index optimization—add missing indexes, remove unused ones.

Query rewriting—JOIN strategies, subquery optimization, materialized views.

Caching strategies—Redis, database query result caching.

Monitoring setup—identify new slow queries before they impact production.

The Process

1

Slow Query Identification

Collect slow queries from logs, identify top offenders.

2

Analysis

Run EXPLAIN ANALYZE, identify full table scans and missing indexes.

3

Optimization

Rewrite queries, add indexes, implement caching.

4

Benchmarking

Benchmark before/after, document improvements, set up monitoring.

FAQ

How to check if an index is being used?

EXPLAIN ANALYZE—if there is no seq scan, the index is used.

When to create a composite index?

When queries filter on 2+ columns together. Order matters: equality columns first, range columns last.

Are partial indexes worth it?

Yes, when 70%+ of rows match the WHERE condition. Size reduction means faster scans.

Got a project?

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WARSAW, PL
pawel.wiszniewski95@gmail.com