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Commit ad9e8b1a authored by Christopher Tate's avatar Christopher Tate
Browse files

Disable db_sample logging 

db_sample logging is thrashing the event log hard, and is currently
neither maintained nor heeded by anybody on the current release.  It
can be re-enabled simply by throwing the appropriate static boolean
to 'true', but for now this should greatly improve the utility of our
event logs.  (We were seeing a rollover period of 20 minutes or less;
ideally we want to see the event log run at least half a day before
rolling.)

Bug 5419627
Bug 5104300

Change-Id: I2125544130aae142974102dbad3b557e49fcd494
parent 63d8b0c8

core/java/android/database/sqlite/SQLiteDatabase.java

+10 −3
Original line number Diff line number Diff line
@@ -66,6 +66,7 @@ import java.util.regex.Pattern; 
 */

public class SQLiteDatabase extends SQLiteClosable {

    private static final String TAG = "SQLiteDatabase";

    private static final boolean ENABLE_DB_SAMPLE = false; // true to enable stats in event log

    private static final int EVENT_DB_OPERATION = 52000;

    private static final int EVENT_DB_CORRUPT = 75004;
@@ -440,9 +441,11 @@ public class SQLiteDatabase extends SQLiteClosable { 
            }

        }

        if (sql != null) {

            if (ENABLE_DB_SAMPLE)  {

                logTimeStat(sql, timeStart, GET_LOCK_LOG_PREFIX);

            }

        }

    }

    private static class DatabaseReentrantLock extends ReentrantLock {

        DatabaseReentrantLock(boolean fair) {

            super(fair);
@@ -726,7 +729,9 @@ public class SQLiteDatabase extends SQLiteClosable { 
                    }

                }

                // log the transaction time to the Eventlog.

                if (ENABLE_DB_SAMPLE) {

                    logTimeStat(getLastSqlStatement(), mTransStartTime, COMMIT_SQL);

                }

            } else {

                try {

                    execSQL("ROLLBACK;");
@@ -2036,8 +2041,10 @@ public class SQLiteDatabase extends SQLiteClosable { 
    }



    /* package */ void logTimeStat(String sql, long beginMillis) {

        if (ENABLE_DB_SAMPLE) {

            logTimeStat(sql, beginMillis, null);

        }

    }



    private void logTimeStat(String sql, long beginMillis, String prefix) {

        // Sample fast queries in proportion to the time taken.