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Force SQLite temp files to be stored in memory (#505) r=rnewman (#506)

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* Force SQLite temp files to be stored in memory (#505) r=rnewman
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Grisha Kruglov 2017-12-20 01:52:09 -05:00 committed by GitHub
parent c61bc79b99
commit 1589104841
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7
db/src/db.rs
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@ -69,12 +69,19 @@ pub fn new_connection<T>(uri: T) -> rusqlite::Result<rusqlite::Connection> where
_ => rusqlite::Connection::open(uri)?, _ => rusqlite::Connection::open(uri)?,
}; };
/// See https://github.com/mozilla/mentat/issues/505 for details on temp_store
/// pragma and how it might interact together with consumers such as Firefox.
/// temp_store=2 is currently present to force SQLite to store temp files in memory.
/// Some of the platforms we support do not have a tmp partition (e.g. Android)
/// necessary to store temp files on disk. Ideally, consumers should be able to
/// override this behaviour (see issue 505).
conn.execute_batch(" conn.execute_batch("
PRAGMA page_size=32768; PRAGMA page_size=32768;
PRAGMA journal_mode=wal; PRAGMA journal_mode=wal;
PRAGMA wal_autocheckpoint=32; PRAGMA wal_autocheckpoint=32;
PRAGMA journal_size_limit=3145728; PRAGMA journal_size_limit=3145728;
PRAGMA foreign_keys=ON; PRAGMA foreign_keys=ON;
PRAGMA temp_store=2;
")?; ")?;
Ok(conn) Ok(conn)