October 2012
Intermediate to advanced
240 pages
7h 52m
Polish
Content preview from MySQL. Mechanizmy wewnętrzne bazy danychBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Rozdział 5. Zmienne konfiguracyjne
Można się wiele dowiedzieć o wewnętrznym działaniu serwera MySQL poprzez studiowanie jego zmiennych konfiguracyjnych. W niektórych przypadkach samo istnienie zmiennej o określonej nazwie stanowi cenną wskazówkę. Na przykład nazwa key_buffer_size ujawnia, że MySQL używa podręcznej pamięci kluczy. Nazwa query_cache_size sugeruje, że serwer może buforować wyniki zapytania, aby uniknąć niepotrzebnej pracy, kiedy wykonuje je wielokrotnie, a zawartość tabel nie ulega w tym czasie zmianie. Nazwa innodb_flush_at_trx_commit sugeruje, że mechanizm składowania InnoDB obsługuje transakcje i może opcjonalnie zapisywać dziennik transakcji na dysku podczas każdego zatwierdzania. Nazwa slave_compressed_protocol świadczy o tym, ...
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