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CLOUDSTACK-2688

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Add DB index to Alert.last_sent column to speed up listAlertsCmd.
This commit is contained in:
Nitin Mehta 2013-05-27 14:02:17 +05:30
parent cc2866c1ea
commit 08ac8fb468
1 changed files with 30 additions and 0 deletions
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30
engine/schema/src/com/cloud/upgrade/dao/Upgrade410to420.java
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@ -28,6 +28,8 @@ import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import com.cloud.network.vpc.NetworkACL;
@ -77,6 +79,34 @@ public class Upgrade410to420 implements DbUpgrade {
updateNetworksForPrivateGateways(conn);
removeFirewallServiceFromSharedNetworkOfferingWithSGService(conn);
fix22xKVMSnapshots(conn);
addIndexForAlert(conn);
}
private void addIndexForAlert(Connection conn) {
//First drop if it exists. (Due to patches shipped to customers some will have the index and some wont.)
List<String> indexList = new ArrayList<String>();
s_logger.debug("Dropping index i_alert__last_sent if it exists");
indexList.add("i_alert__last_sent");
DbUpgradeUtils.dropKeysIfExist(conn, "alert", indexList, false);
//Now add index.
PreparedStatement pstmt = null;
try {
pstmt = conn.prepareStatement("ALTER TABLE `cloud`.`alert` ADD INDEX `i_alert__last_sent`(`last_sent`)");
pstmt.executeUpdate();
s_logger.debug("Added index i_alert__last_sent for table alert");
} catch (SQLException e) {
throw new CloudRuntimeException("Unable to add index i_alert__last_sent to alert table for the column last_sent", e);
} finally {
try {
if (pstmt != null) {
pstmt.close();
}
} catch (SQLException e) {
}
}
}
private void updateSystemVmTemplates(Connection conn) {