latency optimizer

How to reduce the latency of mysql master/slave data synchronization: bitsCN.com Generally, the master/slave mechanism based on LAN can meet the requirements of 'realtime' backup. If the latency is high, first confirm the following factors:1. network latency2. master load3. slave loadThe general practice is to use multiple slave instances to allocate read requests, and then retrieve a dedicated server from

The difference between an embos interrupt and a zero latency interrupt are the interrupt priority level and the usage of OS _enterinterrupt ()/os_leaveinterrupt () or Os_enternestableinterrupt ()/os_leavenestableinterrupt ().Example of an embos interrupt function: void Os_com_isrhandler (void int Dummy; Os_enternestableinterrupt (); Dummy = Us_rhr; // call Embos API functions here Span style= "color: #000000;" > Os_leavenestableinterru

ORACLEMySQL5.6 supports multi-thread replication. you can configure the slave_parallel_workers option to achieve multi-thread concurrent replication on the slave. However, it can only support concurrent replication between multiple databases under an instance, and cannot truly achieve multi-table concurrent replication. Therefore, when there is a large concurrent load, slave still cannot catch up with the master in time, and it is necessary to find a way to optimize it. Generally, slave has a l

/Num_of_reads)END, Writelatency= Case whenNum_of_writes= 0 Then 0 ELSE(Io_stall_write_ms/Num_of_writes)END, Latency= Case when(num_of_reads= 0 andNum_of_writes= 0) Then 0 ELSE(Io_stall/(num_of_reads+Num_of_writes))END, --avg bytes per IOPAvgbperread= Case whenNum_of_reads= 0 Then 0 ELSE(Num_of_bytes_read/Num_of_reads)END, Avgbperwrite= Case whenIo_stall_write_ms= 0

Latency functions in Linux Shell Latency processing is often required in Linux shell scripts. Therefore, sleep or usleep functions are often used. The difference between sleep and usleep is as follows: Sleep: the default unit is seconds. Usleep: measured in microseconds by default. 1 S = 1000 ms = 000000us Sleep not only uses seconds, but also specifies the unit of

Java latency instance analysis: Lock vs Synchronized This article discusses through examples: -Java. concurrent. Lock: Garbage created-Compare Lock and synchronized-How to calculate latency through programming-Impact of Lock and synchronized Competition-The possible impact of co-ordinated omission missing in the latency test on the result Go back to one of m

the library or the Binlog part, the Binlog can directly directly on the library directly from the execution, you can also parse a row of data DML operations, the Binlog part is as follows:==========================================================================================================Another interesting question is that if you are running mysqldump from the library and you are using parallel replication from the library, backup and replication will be blocked from each other:In the abo

Tags: department brings the role of market Ali to develop a point indicator ICAEvery time I saw the big brand of Motorola across the street, we thought about Google's $12.5 billion acquisition of Motorola Mobility, and then sold it to Lenovo for $2.9 billion. Google has made decisions that take long-term interest into account, and in this deal, Google has acquired Motorola's most valuable thousands of patents, a robust Android ecosystem. Google has built a solar power station in a region that oc

Causes of master-slave replication delays:(1) The main library is too many from the library, causing replication delays(2) The difference from the library hardware compared to the main library, resulting in replication delay(3) too many slow SQL statements, resulting in replication latency(4) Master-slave replication design problem, resulting in replication delay(5) Network latency between master and slave

Welcome to the Oracle community forum and interact with 2 million technical staff. When the WHERE clause uses a function for a column, unless this simple technology is used to force the index, otherwise, the Oracle optimizer cannot use indexes in queries. Generally, if the WHERE clause does not use functions such as UPPER, REPLACE, or SUBSTRD Welcome to the Oracle community forum and interact with 2 million technical staff> Go To The WHERE clause to u

Before executing an SQL statement, Oracle needs to analyze the statement execution plan and then execute it according to the execution plan. The execution plan of the Analysis Statement is implemented by the Optimiz Before executing an SQL statement, Oracle needs to analyze the statement execution plan and then execute it according to the execution plan. The execution plan of the Analysis Statement is implemented by the Optimiz Oracle Optimizer (

Last night, PHP 5.0.5 and Apache 2.0.54 [listening port 8088] were installed in Windows XP Professional [with IIS]. When installing the Discuz forum today, Zend-Optimizer is required to support encrypted PHP files. Download To the Win32 Installation File of Zend-Optimizer 2.5.7. The Installation started smoothly. The paths selected by Apache Root and php. ini are: E:/Program Files/Apache Group/Apache2 E:/PH