Search Before a Search Engine

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Why a search feature slows down in MySQL, and how to fix it without a search engine: single round-trip paging, index hints, full-text, and parallel queries.
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A search feature gets slow not because you lack a search engine, but because the access pattern outgrew the data model. To fix it before buying new infrastructure, you climb a ladder of cheaper, reversible changes: single round-trip paging, index hints, full-text and suffix indexing, and parallel queries, weighing each option's price along the way.