List of usage examples for java.lang Runtime gc
public native void gc();
From source file:Main.java
public static void main(String[] args) { Runtime runTime = Runtime.getRuntime(); runTime.gc(); System.out.println("Completed."); }
From source file:MemoryDemo.java
public static void main(String args[]) { Runtime r = Runtime.getRuntime(); long mem1, mem2; Integer someints[] = new Integer[1000]; System.out.println("Total memory is: " + r.totalMemory()); mem1 = r.freeMemory();/*from ww w . j ava2 s . co m*/ System.out.println("Initial free memory: " + mem1); r.gc(); mem1 = r.freeMemory(); System.out.println("Free memory after garbage collection: " + mem1); for (int i = 0; i < 1000; i++) someints[i] = new Integer(i); // allocate integers mem2 = r.freeMemory(); System.out.println("Free memory after allocation: " + mem2); System.out.println("Memory used by allocation: " + (mem1 - mem2)); for (int i = 0; i < 1000; i++) someints[i] = null; r.gc(); // request garbage collection mem2 = r.freeMemory(); System.out.println("Free memory after collecting" + " discarded Integers: " + mem2); }
From source file:MainClass.java
public static void main(String args[]) { Runtime r = Runtime.getRuntime(); long mem1, mem2; Integer someints[] = new Integer[10000]; System.out.println("Total memory is: " + r.totalMemory()); mem1 = r.freeMemory();/*ww w .j av a 2 s. c om*/ System.out.println("Initial free memory: " + mem1); r.gc(); mem1 = r.freeMemory(); System.out.println("Free memory after garbage collection: " + mem1); for (int i = 0; i < someints.length; i++) someints[i] = new Integer(i); // allocate integers mem2 = r.freeMemory(); System.out.println("Free memory after allocation: " + mem2); System.out.println("Memory used by allocation: " + (mem1 - mem2)); for (int i = 0; i < someints.length; i++) someints[i] = null; r.gc(); // request garbage collection mem2 = r.freeMemory(); System.out.println("Free memory after collecting" + " discarded Integers: " + mem2); }
From source file:org.apache.ranger.policyengine.RangerPluginPerfTester.java
public static void main(String[] args) { if (!parseArguments(args)) { System.err.println("Exiting.. "); System.exit(-1);/*from w w w . j a v a 2 s. co m*/ } System.out.println("Arguments:"); System.out.println("\t\tservice-type:\t\t\t" + serviceType); System.out.println("\t\tservice-name:\t\t\t" + serviceName); System.out.println("\t\tapp-id:\t\t\t\t" + appId); System.out.println("\t\tranger-host:\t\t\t" + rangerHostName); System.out.println("\t\tsocket-read-timeout:\t\t" + socketReadTimeout); System.out.println("\t\tpolling-interval:\t\t" + pollingInterval); System.out.println("\t\tpolicy-cache-dir:\t\t" + policyCacheDir); System.out.println("\t\tuse-cached-policy-evaluator:\t" + useCachedPolicyEvaluator); System.out.println("\n\n"); Path filePath = buildConfigurationFile(); if (filePath != null) { RangerConfiguration rangerConfig = RangerConfiguration.getInstance(); rangerConfig.addResource(filePath); plugin = new RangerBasePlugin(serviceType, appId); Runtime runtime = Runtime.getRuntime(); runtime.gc(); long totalMemory = runtime.totalMemory(); long freeMemory = runtime.freeMemory(); System.out.println("Initial Memory Statistics:"); System.out.println("\t\tMaximum Memory available for the process:\t" + runtime.maxMemory()); System.out.println("\t\tInitial In-Use memory:\t\t\t\t" + (totalMemory - freeMemory)); System.out.println("\t\tInitial Free memory:\t\t\t\t" + freeMemory); System.out.println("\n\n"); plugin.init(); while (true) { runtime.gc(); freeMemory = runtime.freeMemory(); totalMemory = runtime.totalMemory(); System.out.println("Memory Statistics:"); System.out.println("\t\tCurrently In-Use memory:\t" + (totalMemory - freeMemory)); System.out.println("\t\tCurrently Free memory:\t\t" + freeMemory); System.out.println("\n\n"); try { Thread.sleep(60 * 1000); } catch (InterruptedException e) { System.err.println("Main thread interrupted..., exiting..."); break; } } } else { System.err.println("Failed to build configuration file"); } }
From source file:org.apache.ranger.policyengine.RangerPolicyenginePerfTester.java
public static void main(String[] args) { if (LOG.isDebugEnabled()) { LOG.debug("==> RangerPolicyenginePerfTester.main()"); }/*from w w w. j a v a 2 s .c o m*/ CommandLineParser commandLineParser = new CommandLineParser(); PerfTestOptions perfTestOptions = commandLineParser.parse(args); if (perfTestOptions != null) { URL statCollectionFileURL = perfTestOptions.getStatCollectionFileURL(); List<String> perfModuleNames = statCollectionFileURL != null ? buildPerfModuleNames(statCollectionFileURL) : new ArrayList<String>(); PerfDataRecorder.initialize(perfModuleNames); URL servicePoliciesFileURL = perfTestOptions.getServicePoliciesFileURL(); RangerPolicyEngineOptions policyEngineOptions = new RangerPolicyEngineOptions(); policyEngineOptions.disableTagPolicyEvaluation = false; policyEngineOptions.evaluatorType = RangerPolicyEvaluator.EVALUATOR_TYPE_OPTIMIZED; policyEngineOptions.disableTrieLookupPrefilter = perfTestOptions.getIsTrieLookupPrefixDisabled(); PerfTestEngine perfTestEngine = new PerfTestEngine(servicePoliciesFileURL, policyEngineOptions, perfTestOptions.getIsDynamicReorderingDisabled()); if (!perfTestEngine.init()) { LOG.error("Error initializing test data. Existing..."); System.exit(1); } URL[] requestFileURLs = perfTestOptions.getRequestFileURLs(); int requestFilesCount = requestFileURLs.length; // warm-up policy engine LOG.error("Warming up.."); try { for (URL requestFileURL : requestFileURLs) { PerfTestClient perfTestClient = new PerfTestClient(perfTestEngine, 0, requestFileURL, 1); if (perfTestClient.init()) { perfTestClient.start(); perfTestClient.join(); } else { LOG.error("Error initializing warm-up PerfTestClient"); } } } catch (Throwable t) { LOG.error("Error during warmup", t); } LOG.error("Warmed up!"); PerfDataRecorder.clearStatistics(); int clientsCount = perfTestOptions.getConcurrentClientCount(); List<PerfTestClient> perfTestClients = new ArrayList<PerfTestClient>(clientsCount); for (int i = 0; i < clientsCount; i++) { URL requestFileURL = requestFileURLs[i % requestFilesCount]; PerfTestClient perfTestClient = new PerfTestClient(perfTestEngine, i, requestFileURL, perfTestOptions.getIterationsCount()); if (!perfTestClient.init()) { LOG.error("Error initializing PerfTestClient: (id=" + i + ")"); } else { perfTestClients.add(perfTestClient); } } if (LOG.isDebugEnabled()) { LOG.debug("Number of perfTestClients=" + perfTestClients.size()); } Runtime runtime = Runtime.getRuntime(); runtime.gc(); long totalMemory = runtime.totalMemory(); long freeMemory = runtime.freeMemory(); LOG.info("Memory stats: max-available=:" + runtime.maxMemory() + "; in-use=" + (totalMemory - freeMemory) + "; free=" + freeMemory); LOG.info("Starting " + perfTestClients.size() + " clients.."); for (PerfTestClient client : perfTestClients) { try { client.start(); } catch (Throwable t) { LOG.error("Error in starting client: " + client.getName(), t); } } LOG.info("Started " + perfTestClients.size() + " clients"); LOG.info("Waiting for " + perfTestClients.size() + " clients to finish up"); for (PerfTestClient client : perfTestClients) { while (client.isAlive()) { try { client.join(1000); runtime.gc(); totalMemory = runtime.totalMemory(); freeMemory = runtime.freeMemory(); LOG.info("Memory stats: max-available=:" + runtime.maxMemory() + "; in-use=" + (totalMemory - freeMemory) + "; free=" + freeMemory); } catch (InterruptedException interruptedException) { LOG.error("PerfTestClient.join() was interrupted"); } } } if (LOG.isDebugEnabled()) { LOG.debug("<== RangerPolicyenginePerfTester.main()"); } LOG.info("Completed performance-run"); perfTestEngine.cleanup(); PerfDataRecorder.printStatistics(); } LOG.info("Exiting..."); }
From source file:io.anserini.index.UserPostFrequencyDistribution.java
@SuppressWarnings("static-access") public static void main(String[] args) throws Exception { Options options = new Options(); options.addOption(new Option(HELP_OPTION, "show help")); options.addOption(new Option(STORE_TERM_VECTORS_OPTION, "store term vectors")); options.addOption(OptionBuilder.withArgName("collection").hasArg() .withDescription("source collection directory").create(COLLECTION_OPTION)); options.addOption(OptionBuilder.withArgName("property").hasArg() .withDescription("source collection directory").create("property")); options.addOption(OptionBuilder.withArgName("collection_pattern").hasArg() .withDescription("source collection directory").create("collection_pattern")); CommandLine cmdline = null;// w w w. ja v a2 s . c o m CommandLineParser parser = new GnuParser(); try { cmdline = parser.parse(options, args); } catch (ParseException exp) { System.err.println("Error parsing command line: " + exp.getMessage()); System.exit(-1); } if (cmdline.hasOption(HELP_OPTION) || !cmdline.hasOption(COLLECTION_OPTION)) { HelpFormatter formatter = new HelpFormatter(); formatter.printHelp(UserPostFrequencyDistribution.class.getName(), options); System.exit(-1); } String collectionPath = cmdline.getOptionValue(COLLECTION_OPTION); final FieldType textOptions = new FieldType(); textOptions.setIndexOptions(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS); textOptions.setStored(true); textOptions.setTokenized(true); textOptions.setStoreTermVectors(true); LOG.info("collection: " + collectionPath); LOG.info("collection_pattern " + cmdline.getOptionValue("collection_pattern")); LOG.info("property " + cmdline.getOptionValue("property")); LongOpenHashSet deletes = null; long startTime = System.currentTimeMillis(); File file = new File(collectionPath); if (!file.exists()) { System.err.println("Error: " + file + " does not exist!"); System.exit(-1); } final JsonStatusCorpusReader stream = new JsonStatusCorpusReader(file, cmdline.getOptionValue("collection_pattern")); Runtime.getRuntime().addShutdownHook(new Thread() { public void run() { try { stream.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } ; System.out.println("# of users indexed this round: " + userIndexedCount); System.out.println("Shutting down"); } }); Status status; boolean readerNotInitialized = true; try { Properties prop = new Properties(); while ((status = stream.next()) != null) { // try{ // status = DataObjectFactory.createStatus(s); // if (status==null||status.getText() == null) { // continue; // }}catch(Exception e){ // // } // boolean pittsburghRelated = false; try { if (Math.abs(status.getLongitude() - pittsburghLongitude) < 0.05d && Math.abs(status.getlatitude() - pittsburghLatitude) < 0.05d) pittsburghRelated = true; } catch (Exception e) { } try { if (status.getPlace().contains("Pittsburgh, PA")) pittsburghRelated = true; } catch (Exception e) { } try { if (status.getUserLocation().contains("Pittsburgh, PA")) pittsburghRelated = true; } catch (Exception e) { } try { if (status.getText().contains("Pittsburgh")) pittsburghRelated = true; } catch (Exception e) { } if (pittsburghRelated) { int previousPostCount = 0; if (prop.containsKey(String.valueOf(status.getUserid()))) { previousPostCount = Integer .valueOf(prop.getProperty(String.valueOf(status.getUserid())).split(" ")[1]); } prop.setProperty(String.valueOf(status.getUserid()), String.valueOf(status.getStatusesCount()) + " " + (1 + previousPostCount)); if (prop.size() > 0 && prop.size() % 1000 == 0) { Runtime runtime = Runtime.getRuntime(); runtime.gc(); System.out.println("Property size " + prop.size() + "Memory used: " + ((runtime.totalMemory() - runtime.freeMemory()) / (1024L * 1024L)) + " MB\n"); } OutputStream output = new FileOutputStream(cmdline.getOptionValue("property"), false); prop.store(output, null); output.close(); } } // prop.store(output, null); LOG.info(String.format("Total of %s statuses added", userIndexedCount)); LOG.info("Total elapsed time: " + (System.currentTimeMillis() - startTime) + "ms"); } catch (Exception e) { e.printStackTrace(); } finally { stream.close(); } }
From source file:gov.jgi.meta.hadoop.input.FastaBlockLineReader.java
public static void main(String[] args) { int num = 1;/*from w ww . j a v a 2s . com*/ int last = -1; do { try { FileInputStream fstream = new FileInputStream("/scratch/karan/30mb.fas"); FastaBlockLineReader fblr = new FastaBlockLineReader(fstream); Text key = new Text(); Map<String, String> setofreads = new HashMap<String, String>(); Map<String, String> setofreadsTotal = new HashMap<String, String>(); int length = (int) (Math.random() * 10000); length = 3000000; System.out.println("lenght = " + length); int total = 0; fblr.readLine(key, setofreads, Integer.MAX_VALUE, length); // System.out.println("setofreads.size = " + setofreads.size()); total += setofreads.size(); //for (String s : setofreads.keySet()) { // System.out.println(s); // } Runtime r = Runtime.getRuntime(); while (setofreads.size() > 0) { setofreadsTotal.putAll(setofreads); setofreads.clear(); fblr.readLine(key, setofreads, Integer.MAX_VALUE, length); // System.out.println("setofreads.size = " + setofreads.size()); total += setofreads.size(); r.gc(); } System.out.println("total = " + total); System.out.println("heap size = " + r.totalMemory() / 1048576); if (last != -1) { if (last != total) { System.out.println( "error!!!, length = " + length + ": last = " + last + " current = " + total); } } last = total; } catch (Exception e) { System.out.println(e); } } while (num-- > 0); }
From source file:org.cloudata.core.tabletserver.ColumnCollection.java
License:asdf
public static void main(String[] args) throws Exception { /*/* www . j a v a 2 s . c om*/ Assuming 32-bit words and a 12 byte overhead per array instance, int[4,100,000][2][2][5] 4th dim. = overhead + length * sizeof(int) = 12 + 5 * 4 = 32 3rd dim. = overhead + length * (sizeof(ref) + sizeof(4th_dim)) = 12 + 2 * (4 + 32) = 84 2nd dim. = overhead + length * (sizeof(ref) + sizeof(3rd_dim)) = 12 + 2 * (4 + 84) = 188 1st dim. = overhead + length * (sizeof(ref) + sizeof(2nd_dim)) = 12 + 4,100,000 * (4 + 188) = 787,200,012 byte[]? ? = 12 + ((length + 3)/8) * 8 + 4 byte? 0 ~ 4 12 + 4 ? ??? 8 ? : 0 ~ 4: 16, 5 ~ 12: 24, 13 ~ 20: 32 ? Text? ? header 4byte, byte[] ? 4byte, int length 4byte, length? ? 4 byte = 16 + len(byte[]) */ //Cell.Key, Row.Key: 16byte + byte[] //ColumnValue: 16 + rowKey, columnKey, value //ColumnCollection: ColumnValue + 124 Runtime runtime = Runtime.getRuntime(); Cell.Key columnKey = new Cell.Key("123"); Row.Key rowKey = new Row.Key("123"); ColumnValue columnValue = new ColumnValue(); ColumnCollection collection = new ColumnCollection(new CloudataConf()); collection.addValue(rowKey, new ColumnValue(rowKey, columnKey, "".getBytes()), 0); byte[] valueBuf = "0123456789".getBytes(); byte[] columnKeyBuf = "abcdefghij".getBytes(); byte[] rowKeyBuf = "!@#$%^&*()".getBytes(); Cell.Key columnKey2 = new Cell.Key("qwertyuiop".getBytes()); Row.Key rowKey2 = new Row.Key("asdfghjkl;".getBytes()); ColumnValue columnValue2 = new ColumnValue(rowKey2, columnKey2, "zxcvbnm,./".getBytes()); columnKey = new Cell.Key(columnKeyBuf); rowKey = new Row.Key(rowKeyBuf); columnValue = new ColumnValue(rowKey, columnKey, valueBuf); runtime.gc(); long before = runtime.freeMemory(); collection.addValue(rowKey, columnValue, 0); collection.addValue(rowKey2, columnValue2, 0); runtime.gc(); long after = runtime.freeMemory(); int byteLen = 12 + ((valueBuf.length + 3) / 8) * 8 + 4; int rowKeyLen = 16 + byteLen; int columnKeyLen = 16 + byteLen; int columnValueLen = 16 + rowKeyLen + columnKeyLen + byteLen; System.out.printf("%d - %d = %d, %d\n", before, after, (before - after), columnValueLen); }
From source file:CGgui.java
public static void main(String[] args) { //initialize gui try {//from w w w . j a v a 2s . c om CGgui CGinterface = new CGgui(); CGinterface.show(); /*Code for Debugging purposes*/ //garbage collect Runtime r = Runtime.getRuntime(); r.gc(); } catch (IndexOutOfBoundsException e) { System.err.println("Caught out of bounds exception"); System.exit(-1); } //grab file // CGinterface.CGdata = CGinterface.LoadSeq("chr21_random.fa"); //process data //find distances of 30 // double[] length = CGinterface.getLengths(30); //graph data // CGinterface.addData(CGinterface.header,length,100000,CGinterface.MIN,CGinterface.MAX); // CGinterface.MovingAverage(150); // CGinterface.Bezier(.01); }
From source file:Mem.java
public static void gc() { Runtime r = Runtime.getRuntime(); r.runFinalization(); r.gc(); }