/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.test.db;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import org.h2.engine.Constants;
import org.h2.store.fs.FileUtils;
import org.h2.test.TestBase;
/**
* Tests if disk space is reused after deleting many rows.
*/
public class TestSpaceReuse extends TestBase {
/**
* Run just this test.
*
* @param a ignored
*/
public static void main(String... a) throws Exception {
TestBase.createCaller().init().test();
}
@Override
public void test() throws SQLException {
if (config.memory) {
return;
}
deleteDb("spaceReuse");
long max = 0, now = 0, min = Long.MAX_VALUE;
for (int i = 0; i < 20; i++) {
Connection conn = getConnection("spaceReuse");
Statement stat = conn.createStatement();
stat.execute("set retention_time 0");
stat.execute("create table if not exists t(i int)");
stat.execute("insert into t select x from system_range(1, 500)");
conn.close();
conn = getConnection("spaceReuse");
conn.createStatement().execute("delete from t");
conn.close();
String fileName = getBaseDir() + "/spaceReuse";
if (Constants.VERSION_MINOR >= 4) {
fileName += Constants.SUFFIX_MV_FILE;
} else {
fileName += Constants.SUFFIX_PAGE_FILE;
}
now = FileUtils.size(fileName);
assertTrue(now > 0);
if (i < 10) {
max = Math.max(max, now);
} else {
min = Math.min(min, now);
}
}
assertTrue("min: " + min + " max: " + max, min <= max);
deleteDb("spaceReuse");
}
}