import java.time.LocalDateTime;
import java.time.ZonedDateTime;
import java.util.Collection;
import java.util.Date;
import java.util.Map;
import java.util.Objects;

public final class MemoryUtil {
    private MemoryUtil() {
    }

    public static String getMemoryUsageLog() {
        final Runtime runtime = Runtime.getRuntime();
        final long freeBytes = runtime.freeMemory();

        assertEquals(24L, MemoryUtil.sizeOf(Long.MAX_VALUE));
        assertEquals(24L, MemoryUtil.sizeOf(Short.MAX_VALUE));
        assertEquals(24L, MemoryUtil.sizeOf(Float.MAX_VALUE));
        assertEquals(24L, MemoryUtil.sizeOf(Double.MAX_VALUE));
        assertEquals(24L, MemoryUtil.sizeOf(Byte.MAX_VALUE));
        assertEquals(16L, MemoryUtil.sizeOf(Boolean.TRUE));

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocList;
import org.codelibs.fess.util.DocumentUtil;
import org.codelibs.fess.util.MemoryUtil;

public class IndexUpdateCallbackImpl implements IndexUpdateCallback {
    private static final Logger logger = LogManager.getLogger(IndexUpdateCallbackImpl.class);

                            (systemHelper.getCurrentTimeAsLong() - execTime), MemoryUtil.byteCountToDisplaySize(docList.getContentSize()),
                            MemoryUtil.getMemoryUsageLog());
                } else {
                    logger.info("Sent {}  docs (Doc:{send {}ms}, {})", docList.size(), (systemHelper.getCurrentTimeAsLong() - execTime),
                            MemoryUtil.getMemoryUsageLog());
                }
            }

import org.codelibs.fess.ingest.Ingester;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocList;
import org.codelibs.fess.util.MemoryUtil;
import org.codelibs.fess.util.ThreadDumpUtil;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

        for (int i = 0; i < 30; i++) {
            if (MemoryUtil.getUsedMemory() < current + margin) {
                break;
            }
            System.gc();
            Thread.sleep(1000L);
        }
        final long usedMemory = MemoryUtil.getUsedMemory();
        assertTrue(usedMemory + " < " + current + " + " + margin + ", " + MemoryUtil.getMemoryUsageLog(), usedMemory < current + margin);
    }