Java Environment.setMutableConfig方法代碼示例

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
private static void doEvict(Environment env)
    throws DatabaseException {
	
    /* push the cache size down by half to force eviction. */
    EnvironmentImpl envImpl = DbInternal.envGetEnvironmentImpl(env);
    long cacheUsage = envImpl.getMemoryBudget().getCacheMemoryUsage();
    EnvironmentMutableConfig c = new EnvironmentMutableConfig();
    c.setCacheSize(cacheUsage/2);
    env.setMutableConfig(c);

    long start = System.currentTimeMillis();
    env.evictMemory();
    long end = System.currentTimeMillis();

    DecimalFormat f = new DecimalFormat();
    f.setMaximumFractionDigits(2);
    System.out.println("evict time=" + f.format(end-start));
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
private static void doEvict(Environment env) 
    throws DatabaseException {
	
    /* push the cache size down by half to force eviction. */
    EnvironmentImpl envImpl = DbInternal.envGetEnvironmentImpl(env);
    long cacheUsage = envImpl.getMemoryBudget().getCacheMemoryUsage();
    EnvironmentMutableConfig c = new EnvironmentMutableConfig();
    c.setCacheSize(cacheUsage/2);
    env.setMutableConfig(c);

    long start = System.currentTimeMillis();
    env.evictMemory();
    long end = System.currentTimeMillis();

    DecimalFormat f = new DecimalFormat();
    f.setMaximumFractionDigits(2);
    System.out.println("evict time=" + f.format(end-start));
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
@SuppressWarnings("unused")
private static void doEvict(Environment env)
    throws DatabaseException {
        
    /* Push the cache size down by half to force eviction. */
    EnvironmentImpl envImpl = DbInternal.getEnvironmentImpl(env);
    long cacheUsage = envImpl.getMemoryBudget().getCacheMemoryUsage();
    EnvironmentMutableConfig c = new EnvironmentMutableConfig();
    c.setCacheSize(cacheUsage/2);
    env.setMutableConfig(c);

    long start = System.currentTimeMillis();
    env.evictMemory();
    long end = System.currentTimeMillis();

    DecimalFormat f = new DecimalFormat();
    f.setMaximumFractionDigits(2);
    System.out.println("evict time=" + f.format(end-start));
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
void setEnvironmentMutableConfig(Environment env)
    throws DatabaseException {
    EnvironmentMutableConfig config = env.getMutableConfig();
    config.setTxnNoSync(envNoSync);
    config.setTxnWriteNoSync(envWriteNoSync);
    env.setMutableConfig(config);
}
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
/**
    * Check that all INs are removed from the INList for a DB that is removed
    * before it is sync'ed (or checkpointed).  Before the bug fix, INs were
    * not removed if the DB root IN was never logged (was still null).  This
    * caused a DatabaseException when evicting, because the evictor expects no
    * INs for deleted DBs on the INList.
    */
   public void testRemoveNonPersistentDbSR15317()
throws Throwable {

Database db = null;
try {
    EnvironmentConfig envConfig = getEnvConfig(true);
           /* Disable compressor for test predictability. */
           envConfig.setConfigParam("je.env.runINCompressor", "false");
    env = new Environment(envHome, envConfig);
    db = createDb(true);
           /* Insert some data to cause eviction later. */
           insert(db,
                  null,          // txn
                  1,             // start
                  30000,         // end
                  new HashSet(), // expected
                  false);        // useRandom
           db.close();
           env.removeDatabase(null, DBNAME);

           envConfig = env.getConfig();
           /* Switch to a small cache to force eviction. */
           envConfig.setCacheSize(96 * 1024);
           env.setMutableConfig(envConfig);
           for (int i = 0; i < 10; i += 1) {
               env.evictMemory();
           }
       } finally {
           if (env != null) {
               try {
                   env.close();
               } catch (Throwable e) {
                   System.out.println("Ignored: " + e);
               }
               env = null;
           }
       }
   }
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
/**
    * Check that all INs are removed from the INList for a DB that is removed
    * before it is sync'ed (or checkpointed).  Before the bug fix, INs were
    * not removed if the DB root IN was never logged (was still null).  This
    * caused a DatabaseException when evicting, because the evictor expects no
    * INs for deleted DBs on the INList.
    */
   public void testRemoveNonPersistentDbSR15317()
throws Throwable {

Database db = null;
try {
    EnvironmentConfig envConfig = getEnvConfig(true);
           /* Disable compressor for test predictability. */
           envConfig.setConfigParam("je.env.runINCompressor", "false");
    env = new Environment(envHome, envConfig);
    db = createDb(true);
           /* Insert some data to cause eviction later. */
           insert(db, 
                  null,          // txn
                  1,             // start
                  30000,         // end
                  new HashSet(), // expected
                  false);        // useRandom
           db.close();
           env.removeDatabase(null, DBNAME);

           envConfig = env.getConfig();
           /* Switch to a small cache to force eviction. */
           envConfig.setCacheSize(96 * 1024);
           env.setMutableConfig(envConfig);
           for (int i = 0; i < 10; i += 1) {
               env.evictMemory();
           }
       } finally {
           if (env != null) {
               try {
                   env.close();
               } catch (Throwable e) {
                   System.out.println("Ignored: " + e);
               }
               env = null;
           }
       }
   }
 

import com.sleepycat.je.Environment; //導入方法依賴的package包/類
/**
    * Tests that setting je.env.runCleaner=false stops the cleaner from
    * processing more files even if the target minUtilization is not met
    * [#15158].
    */
   public void testCleanerStop()
throws Throwable {

       final int fileSize = 1000000;
       EnvironmentConfig envConfig = TestUtils.initEnvConfig();
       envConfig.setAllowCreate(true);
       envConfig.setConfigParam
    (EnvironmentParams.ENV_RUN_CLEANER.getName(), "false");
       envConfig.setConfigParam
           (EnvironmentParams.LOG_FILE_MAX.getName(),
            Integer.toString(fileSize));
       envConfig.setConfigParam
    (EnvironmentParams.CLEANER_MIN_UTILIZATION.getName(), "80");
       Environment env = new Environment(envHome, envConfig);

       DatabaseConfig dbConfig = new DatabaseConfig();
       dbConfig.setAllowCreate(true);
       Database db = env.openDatabase(null, "CleanerStop", dbConfig);

       DatabaseEntry key = new DatabaseEntry(new byte[1]);
       DatabaseEntry data = new DatabaseEntry(new byte[fileSize]);
       for (int i = 0; i <= 10; i += 1) {
           db.put(null, key, data);
       }
       env.checkpoint(forceConfig);

       EnvironmentStats stats = env.getStats(null);
       assertEquals(0, stats.getNCleanerRuns());

       envConfig = env.getConfig();
       envConfig.setConfigParam
    (EnvironmentParams.ENV_RUN_CLEANER.getName(), "true");
       env.setMutableConfig(envConfig);

       int iter = 0;
       while (stats.getNCleanerRuns() == 0) {
           iter += 1;
           if (iter == 20) {
               fail("Cleaner did not run after " + iter + " tries");
           }
           Thread.yield();
           Thread.sleep(1);
           stats = env.getStats(null);
       }

       envConfig.setConfigParam
    (EnvironmentParams.ENV_RUN_CLEANER.getName(), "false");
       env.setMutableConfig(envConfig);

       int prevNFiles = stats.getNCleanerRuns();
       stats = env.getStats(null);
       int currNFiles = stats.getNCleanerRuns();
       if (currNFiles - prevNFiles > 5) {
           fail("Expected less than 5 files cleaned," +
                " prevNFiles=" + prevNFiles +
                " currNFiles=" + currNFiles);
       }

       //System.out.println("Num runs: " + stats.getNCleanerRuns());

db.close();
env.close();
   }