forked from lix-project/lix
Increase SQLite's auto-checkpoint interval
Common operations like instantiating a NixOS system config no longer fitted in 8192 pages, leading to more fsyncs. So increase this limit.
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@ -380,10 +380,10 @@ void LocalStore::openDB(bool create)
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sqlite3_exec(db, ("pragma main.journal_mode = " + mode + ";").c_str(), 0, 0, 0) != SQLITE_OK)
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throwSQLiteError(db, "setting journal mode");
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/* Increase the auto-checkpoint interval to 8192 pages. This
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/* Increase the auto-checkpoint interval to 40000 pages. This
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seems enough to ensure that instantiating the NixOS system
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derivation is done in a single fsync(). */
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if (mode == "wal" && sqlite3_exec(db, "pragma wal_autocheckpoint = 8192;", 0, 0, 0) != SQLITE_OK)
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if (mode == "wal" && sqlite3_exec(db, "pragma wal_autocheckpoint = 40000;", 0, 0, 0) != SQLITE_OK)
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throwSQLiteError(db, "setting autocheckpoint interval");
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/* Initialise the database schema, if necessary. */
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