DatabasesWhy Your SQL Query Is Slow: Six Causes, In Order
"The database is slow" is the least useful sentence in backend work. The database is almost never slow — a specific query is, for one of about six reasons.
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4 articles in Databases · Clear filters
Databases
DatabasesDatabase Indexing Explained: Fast Until Suddenly It Isn't
A page loaded in 200ms for a year, then took nine seconds. Nothing was deployed. The table had simply crossed four million rows.
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DatabasesJust Use Postgres: Six Data Systems for 4GB of Data
Postgres, MongoDB, Redis, Elasticsearch, RabbitMQ and Pinecone — for a six-person team with 4GB of data. Nobody made a bad decision individually.
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DatabasesPostgreSQL, MongoDB, MySQL or Redis: Choosing Without Regret
They chose MongoDB because their data was flexible. Eighteen months on they were doing three-collection lookups per request and repairing orphans every night.
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