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Code Issues Releases Wiki Activity

sqlite pragma

This commit is contained in:
M66B 2021-02-23 15:01:59 +01:00
parent 95bc640c52
commit 512541483b
1 changed files with 20 additions and 6 deletions
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26
app/src/main/java/eu/faircode/email/DB.java
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@ -113,6 +113,7 @@ public abstract class DB extends RoomDatabase {
private static final String DB_NAME = "fairemail";
private static final int DB_CHECKPOINT = 1000; // requery/sqlite-android default
private static final int DB_CACHE_SIZE = -5000; // https://www.sqlite.org/pragma.html#pragma_cache_size
private static final String[] DB_TABLES = new String[]{
"identity", "account", "folder", "message", "attachment", "operation", "contact", "certificate", "answer", "rule", "log"};
@ -124,7 +125,7 @@ public abstract class DB extends RoomDatabase {
File dbfile = configuration.context.getDatabasePath(DB_NAME);
if (dbfile.exists()) {
try (SQLiteDatabase db = SQLiteDatabase.openDatabase(dbfile.getPath(), null, SQLiteDatabase.OPEN_READWRITE)) {
Log.i("DB checkpoint=" + DB_CHECKPOINT);
Log.i("Set PRAGMA wal_autocheckpoint=" + DB_CHECKPOINT);
try (Cursor cursor = db.rawQuery("PRAGMA wal_autocheckpoint=" + DB_CHECKPOINT + ";", null)) {
cursor.moveToNext(); // required
}
@ -280,12 +281,25 @@ public abstract class DB extends RoomDatabase {
" version=" + db.getVersion() +
" WAL=" + db.isWriteAheadLoggingEnabled());
try (Cursor cursor = db.query("PRAGMA journal_mode;")) {
Log.i("journal_mode=" + (cursor.moveToNext() ? cursor.getString(0) : "?"));
}
// https://www.sqlite.org/pragma.html
for (String pragma : new String[]{
"journal_mode", "journal_size_limit",
"wal_checkpoint", "wal_autocheckpoint",
"page_count", "page_size",
"default_cache_size", "cache_size"})
try (Cursor cursor = db.query("PRAGMA " + pragma + ";")) {
Log.i("Get PRAGMA " + pragma + "=" + (cursor.moveToNext() ? cursor.getString(0) : "?"));
}
try (Cursor cursor = db.query("PRAGMA wal_autocheckpoint;")) {
Log.i("wal_autocheckpoint=" + (cursor.moveToNext() ? cursor.getInt(0) : "?"));
if (BuildConfig.DEBUG) {
Log.i("Set PRAGMA cache_size=" + DB_CACHE_SIZE);
try (Cursor cursor = db.query("PRAGMA cache_size=" + DB_CACHE_SIZE + ";", null)) {
cursor.moveToNext(); // required
}
try (Cursor cursor = db.query("PRAGMA cache_size;")) {
Log.i("Get PRAGMA cache_size=" + (cursor.moveToNext() ? cursor.getInt(0) : "?"));
}
}
if (BuildConfig.DEBUG && false) {