enqueue

enqueue的基本解释

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排队, [计算机]入队

与enqueue相关的网络例句 [注：此内容来源于网络，仅供参考]

In 10.2.0.4 database alert log the following error appears: ORA-00494: enqueue held for too long (more than 900 seconds) This error can also be accompanied by ORA-600 [2103] which is basically the same problem - a process was unable to obtain the CF enqueue within the specified timeout (default 900 seconds).

ORA-00494或许还会伴随 ORA-600 [2103]错误的出现，这是Oracle10.2.0.4中引入的一个行为改变。在Oracle10.2.0.4中，如果一个进程在指定的时间（默认900秒）内无法获得CF锁，则CF锁的执行进程会被kill。从Metalink上可以发现，CF enqueue相关的bug是相当的多，10.2.0.4这个行为的引入，估计是Oracle视图对这个问题做出解决的一种尝试。

Thu Apr 2 10:55:36 2009 Errors in file /bdump/test.trc: ORA-00494: enqueue held for too long (more than 900 seconds) by 'inst 1, osid 82866' Thu Apr 2 10:55:39 2009 Killing enqueue blocker (pid=82866) on resource CF-00000000-00000000 by terminating the process

Oracle10.2.0.4中，如果数据库压力较大，IO发生短暂停止响应的时候，可能导致数据库实例崩溃。在alert中可以找到如下错误

The invention provides a method for achieving priority level for generating sequence of mapping items which are transformed by network address, the method comprises the following method, first, when an address conversion apparatus needs to converse address after the address conversion apparatus receives a data packet, judging whether the items are generated, upwards sending the data packet to a CPU when a mapping item is not generated, step B, judging whether concurrent mapping number exceeds the preset mapping enqueue threshold with the CPU, if exceeds the preset mapping enqueue threshold, and judging whether a Referer field is contained in HTTP data, and recording the Referer field or a GET field according to judgment result, writing in a REF table, and arraying a priority level for each user according to a write sequence, and step C, leading the CPU to generate map in turn according to the priority level in the REF table, and then sending down to a forwarding layer to transfer a data packet.

本发明提供一种对网络地址转换的映射条目生成顺序实现优先级的方法，包括下列步骤：步骤A：当地址转换设备收到数据包后，需要进行地址转换时，判断映射条目是否已经生成，在未生成映射条目时，将数据包上送至CPU；步骤B：CPU判断并发映射数是否超过预定的映射入队门限，如果是，则判断在HTTP数据中是否含有Referer字段，并根据判断结果记录Referer字段或者GET字段，写入REF表中，并将每个用户依照写入顺序排列出优先级；步骤C：CPU依照REF表中的优先级依次生成映射，然后下发到转发层面转发数据包。

与enqueue相关的网络解释 [注：此内容来源于网络，仅供参考]

enqueue：排队

事件处理器事先在关注的事件源上注册,后者不定期地发表事件对象,经过事件管理器的转化(translate)、合并(coalesce)、排队(enqueue)、分派(dispatch)等集中处理后,事件处理器接收到事件并对其进行相应处理.

enqueue：队列

Oracle 9i RAC 多节点的结构引入了一个新的硬件模块 -- RAC 节点间的互联网络,用于协调各个节点的运行,包括全局锁(global locking),队列(enqueue)和缓存管理(buffer cache management).

enqueue：入队

先进先出队列支持2种基本操作:出列(Dequeue)和入队(Enqueue). 出列是把队列的头数据进行处理,而入队则是把新待处理数据加入到队列的末尾. 当然,某些队列的实现还会支持查看头数据(Peek)和计算队列长度(getLength)这2种操作.

enqueue：储入队列

Enlargement 放大 | Enqueue 储入队列 | enter 输入

shared enqueue：共享进入队列

共价键 shared electron bond | 共享进入队列 shared enqueue | 共享环境 shared environment