(2)读模式下,调用 clear()方法,将buffer切换为写模式,将postion为清零,limit设置为capacity最大容量值,可以一直写入,直到buffer写满。 接着上面的实例,使用实例代码,演示一下clear方法。 代码如下: public static void clearDemo() { Logger.info("---after clear---"); byteBuffer.clear(); Logger.info("po...
1 I was able to duplicate the same issue of buffer size limit exceeded using ServiceStack. The code to do the stress testing is here - run 20 instances of the application for at least 20 minutes. https://github.com/ServiceStack/ServiceStack.Redis/commit/b01582f9c873f375794c04d46aad400590...
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System.out.println("capacity:"+ buffer.capacity());for(inti=0; i <5; ++i) {intrandomNumber=newSecureRandom().nextInt(20); buffer.put(randomNumber); } System.out.println("before flip limit:"+ buffer.limit()); buffer.flip(); System.out.println("after flip limit:"+ buffer.limit())...
ah, I thought this limit was different from the others. That makes sense though. (Also since they're singletons as described by Myles in the meeting, I'm not concerned about it anymore.) I'm implementing this now. I now agree that we should just add a maxBufferSize limit. I'll make...
This may lead occasionally to a lack of available storage in the cache, if none of the blocks has been used to the particular limit. The likelihood of occurrance of such a no-vacancy situation in the cache will be reduced by increasing the block size. Saving the rank-count logic and ...
一个刚创建的buffer是写模式,比如ByteBuffer.allocate(10),此时position=0,limit=10,如下图所示。 limit表示读或写的极限,由于当前是写模式,因此可以写10个数据,且每写入一次数据,position就会加1。如果写第11个数据,则会报错。 limit是可以修改的,比如改成5,则最多只能放5个数据,写入第6个时就会报错,如下图...
列表数据不要拿全表,要使用LIMIT来分页,每页数量也不要太大。 4引擎 目前广泛使用的是MyISAM和InnoDB两种引擎: MyISAM MyISAM引擎是MySQL 5.1及之前版本的默认引擎,它的特点是: 不支持行锁,读取时对需要读到的所有表加锁,写入时则对表加排它锁;
靠近 LRU 链表头部的数据页表示最近经常被访问,靠近尾部表示数据页长期未被访问,这两个部分的交汇处称为 midpoint,即 innodb_old_blocks_pct这个点的设置。默认是37%,最小是5,最大是95;如果内存比较大的话,可以将这个数值调低,通常会调成20,也就是说20%的是冷数据块。目的是为了保护热区数据不被刷出内存。
VPSIZENumber of 2 GB frames allocatedComment 1000The amount of storage that is available is less than 2 GB, and is less than the internally defined limit for rounding up to 2 GB. 4986881The amount of storage that is available is less than 2 GB, but is within an internally defined limit...