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Set WAL checkpoint to 100 (experimental)

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M66B
2020-01-20 20:24:08 +01:00
parent bcd2c41b28
commit 0b7e5a8e21
1 changed files with 19 additions and 0 deletions
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19
app/src/main/java/eu/faircode/email/DB.java
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@@ -34,6 +34,7 @@ import javax.mail.Address;
import javax.mail.internet.InternetAddress; import javax.mail.internet.InternetAddress;
import io.requery.android.database.sqlite.RequerySQLiteOpenHelperFactory; import io.requery.android.database.sqlite.RequerySQLiteOpenHelperFactory;
import io.requery.android.database.sqlite.SQLiteDatabase;
/* /*
This file is part of FairEmail. This file is part of FairEmail.
@@ -104,6 +105,24 @@ public abstract class DB extends RoomDatabase {
Helper.getBackgroundExecutor(1, "query"); Helper.getBackgroundExecutor(1, "query");
private static final String DB_NAME = "fairemail"; private static final String DB_NAME = "fairemail";
private static final int DB_CHECKPOINT = 100;
@Override
public void init(@NonNull DatabaseConfiguration configuration) {
// https://www.sqlite.org/pragma.html#pragma_wal_autocheckpoint
String dbpath = configuration.context.getDatabasePath(DB_NAME).getPath();
if (new File(dbpath).exists()) {
try (SQLiteDatabase db = SQLiteDatabase.openDatabase(dbpath, null, SQLiteDatabase.OPEN_READWRITE)) {
Log.i("DB checkpoint=" + DB_CHECKPOINT);
try (Cursor cursor = db.rawQuery("PRAGMA wal_autocheckpoint=" + DB_CHECKPOINT + ";", null)) {
cursor.moveToNext();
}
}
}
super.init(configuration);
}
public static synchronized DB getInstance(Context context) { public static synchronized DB getInstance(Context context) {
if (sInstance == null) { if (sInstance == null) {