file system cache

Previous blog about MongoDB mmapv1 storage engine, this article then introduces mongodb Another storage engine-- wiredtiger wiredtiger mongodb3.0 mongodb3.2 version began to become mongodb default storage engine. Compare mmapv1

A brief analysis of Linux memory management mechanismThis paper makes a simple analysis of the Linux memory management mechanism, and tries to make you understand the concept of Linux memory management quickly and make use of some management methods

Linux memory management, in fact, and Windows memory management has a very similar place, are using the concept of virtual memory, said here have to scold MS, why in many times there is a lot of physical memory, but still use the pagefile. So often

In previous learning and practice hive, the CLI or hive–e approach was used, allowing only HIVEQL to perform queries, updates, and so on, and this was a clumsy and singular approach. Fortunately, Hive provides a light client implementation that,

For details about MySQL service optimization parameter settings, refer to l general class: key_buffer_size. Meaning: the buffer size used for index blocks. Add indexes that can be better processed (for all read and multi-Rewrite ). Impact: the

In the hadoop framework source code Org. apache. hadoop. the FS package is related to the implementation of the hadoop file system, including the establishment of the file system model, the definition of the file system, and the implementation of

Reference Documentation:Http://learnes.net/distributed_crud/bulk_requests.htmlOne, distributed cluster 1.1 empty clusterA single machine with no data and no index.A node in the cluster is elected as the Master node for all node management.Unlike

IPhone Process Management helper: 91 Process Management Of course, we also need to have a certain understanding of the iPhone process. The following are common iPhone Process projects and hope to help you use the iPhone. The process is described as

In the Apache server, keepalive is a Boolean value. On indicates opening, and off indicates disabling. This command exists in many other HTTPd servers. The keepalive configuration command determines whether to immediately close the TCP connection

AIX details user/process memory usage description: topas indicates that % comp memory is used 98% problem analysis: 1, arrange 10 memory usage processes from large to small psaux | head-1; psaux | sort-rn + 3 | head-10 for details :... AIX details

This article mainly introduces how to use cgroups to manage disk I/O in Linux. For more information, see Linux cgroups can also restrict and monitor disk io of processes. This function is implemented through the blkio subsystem. There are many

For MySQL service optimization parameter settings, see bitsCN.com. MySQL service optimization parameter settings reference L General class: Key_buffer_size Description: it is used to index the buffer size of a block and increase the size of

Win7 shared, Win7 access is normal, but XP occasionally encounters this problem, waiting to continue to observe.Http://blog.sina.com.cn/s/blog_79c0eb8701016ajg.htmlAlways encounter Win7 file sharing error prompt is generally "insufficient storage

The database SQLServer is born with the same parent in the Windows operating system, and they have technical connectivity. This is reflected in many aspects. For example, in our daily work, we can adjust some parameters of the Windows operating

There is a parameter called swappiness in the Linux kernel. You can adjust how memory is used.By default, this value is 60, which means that the kernel will provide more memory for the file system as a cache, or even swap the memory occupied by some

In pediy.com sent a translation, simply reproduced here.The cache manager is a tightly integrated software component of the NT Memory manager that integrates the file system cache data with the virtual memory system.The advantage is that the use of

use MongoDB as a pure memory database (Redis style) Basic Ideas The use of MongoDB as a memory database (In-memory db), which is not allowing MongoDB to save data to disk, has aroused more and more people's interest. This usage is very practical

 command-Related: 1, view the diskDf-h2, view memory sizeFreeFree [-m|g] Press MB,GB to display memoryVmstat3, view CPUCat/proc/cpuinfoLook only at the number of CPUs grep "model name"/proc/cpuinfo | Wc-l4, View system memoryCat/proc/meminfo5,

First, we know that in MySQL, the binary log is the server layer, which is used primarily for the decision-making from replication and instant-point recovery. The transaction log (redo log) is the InnoDB storage engine layer, which is used to ensure

Core control parametersInnoDB Storage Engine controls the policy of the Redo log flushing to disk through the Innodb_flush_log_at_trx_commit parameterTo view parameter values: like ' Innodb_flush_log_at_trx_commit ';To modify a parameter value:Set =