ShardingJdbc批量操作引发fullGC解决

public final class SQLStatementParserEngine {
    private final SQLStatementParserExecutor sqlStatementParserExecutor;
    private final LoadingCache<String, SQLStatement> sqlStatementCache;
    public SQLStatementParserEngine(String databaseType, SQLParserRule sqlParserRule) {
        this.sqlStatementParserExecutor = new SQLStatementParserExecutor(databaseType, sqlParserRule);
        this.sqlStatementCache = SQLStatementCacheBuilder.build(sqlParserRule, databaseType);
    }
    public SQLStatement parse(String sql, boolean useCache) {
        return useCache ? (SQLStatement)this.sqlStatementCache.getUnchecked(sql) : this.sqlStatementParserExecutor.parse(sql);
    }
}

@Mapper
public interface OrderMapper {
    Integer batchInsertOrder(List<Order> orders);
}

<insert id="batchInsertOrder" parameterType="com.mmc.sharding.bean.Order" >
        insert into t_order (id,code,amt,user_id,create_time)
        values
        <foreach collection="list" item="item" separator=",">
            (#{item.id},#{item.code},#{item.amt},#{item.userId},#{item.createTime})
        </foreach>
</insert>

 @RequestMapping("/batchInsert")
    public String batchInsert(){
        for (int j = 0; j < 1000; j++) {
            List<Order> orderList = new ArrayList<>();
            int i1 = new Random().nextInt(1000) + 500;
            for (int i = 0; i < i1; i++) {
                Order order=new Order();
                order.setCode("abc"+i);
                order.setAmt(new BigDecimal(i));
                order.setUserId(i);
                order.setCreateTime(new Date());
                orderList.add(order);
            }
            orderMapper.batchInsertOrder(orderList);
            System.out.println(j);
        }
        return "success";
    }

@RequestMapping("/batchInsert")
    public String batchInsert(){
        for (int j = 0; j < 1; j++) {
            List<Order> orderList = new ArrayList<>();
            int i1 = new Random().nextInt(1000) + 500;
            for (int i = 0; i < i1; i++) {
                Order order=new Order();
                order.setCode("abc"+i);
                order.setAmt(new BigDecimal(i));
                order.setUserId(i);
                order.setCreateTime(new Date());
                orderList.add(order);
            }
            List<List<Order>> shard = ShardingUtils.shard(orderList);
            shard.stream().forEach(
                    orders->{
                        orderMapper.batchInsertOrder(orders);
                    }
            );
            System.out.println(j);
        }
        return "success";
    }

public class ShardingUtils {
    private static Integer[] nums = new Integer[]{800,500,300, 200, 100, 50, 25, 10, 5, 2, 1};
    public static <T> List<List<T>> shard(final List<T> originData) {
        return shard(originData, new ArrayList<>());
    }
    private static <T> List<List<T>> shard(final List<T> originData, List<List<T>> result) {
        if (originData.isEmpty()) {
            return result;
        }
        for (int i = 0; i < nums.length; i++) {
            if (originData.size() >= nums[i]) {
                List<T> ts = originData.subList(0, nums[i]);
                result.add(ts);
                List<T> ts2 = originData.subList(nums[i], originData.size());
                if (ts2.isEmpty()) {
                    return result;
                } else {
                    return shard(ts2, result);
                }
            }
        }
        return result;
    }
}