om1 vs om2

[MySQLCPU] the online traffic soared by 800%. an alarm was triggered when the load reached 12. the load reached 800%, and the load was too high. 11 times. MySQL version 5.6.12-log After 1, mysqld processes occupy all resources. 2. View error logs without any exceptions. 3 show eninge innodb status/G, no deadlock information. 4 show full processlist; There is no time-consuming slow SQL statement to run again. Depending on concurrency, the current total number of threads is about 30. 5. check ios

After receiving an alarm, the load was too high, reached 800%, and the load was too high, with 11 errors. MySQL version 5.6.12-log After 1, mysqld processes occupy all resources. 2. View error logs without any exceptions. 3 show eninge innodb status \ G, no deadlock information. 4 show full processlist; There is no time-consuming slow SQL statement to run again. Depending on concurrency, the current total number of threads is about 30. 5. Check iostat. The read and write operations are norm

[MySQLCPU] the online traffic soared by 800%. an alarm was triggered when the load reached 12. the load reached 800%, and the load was too high. 11 times. MySQL version 5.6.12-log After 1, mysqld processes occupy all resources. 2. View error logs without any exceptions. 3 show eninge innodb status/G, no deadlock information. 4 show full processlist; There is no time-consuming slow SQL statement to run again. Depending on concurrency, the current total number of threads is about 30. 5. check ios

again. Depending on concurrency, the current total number of threads is about 30. 5. Check iostat. The read and write operations are normal. What is the problem? View the slow log and find that the following SQL statements are executed frequently, which takes 5 seconds. The explain statements include the Using join buffer (Block Nested Loop) mysql> explain select web_page_object.web_page_object_id, -> web_page_object.object_id, -> web_p_name,web_page_object.position_sort,web_pa

Received alarm notification, the load is too high, reached 800%,load is too high, there are 11.MySQL version number is 5.6.12-logAfter 1 top, it is true that the mysqld process occupies all the resources.2 Viewing the error log, no matter what the exception3 show Eninge InnoDB status\g, no deadlock information.4 show full processlist;There is no time-consuming slow SQL to run again. See concurrency, the current total number of threads is only about 30.5 view Iostat, read and write normal.What is

Transaction Processing Methods: begintransaction, commit, and abort. See the following code: // Declare Category C1, C2;C1 = New Category ();C1.categoryname = " Seafood1 " ;C1.description = " Seaweed and fish " ;C2 = New Category ();C2.categoryname = " Seafood2 " ;C2.description = " Seaweed and fish " ; Using (Iobjectmanager om = Objectmanager. Create ( Typeof (Category ))) {Try {Om. begintransaction

up to 10km. It is primarily suitable for environments where multimode and singlemode fibers are supported simultaneously in a single fiber module. Because the 10GBASE-LX4 standard uses 4-channel laser light source, so in the cost, fiber optic line diameter and power cost more than 10GBASE-LRM specifications have shortcomings. 2.5) 10gbase-lrm Prior to 10GBASE-LRM, there were two 10GE ports that supported multimode fibers, namely 10GBASE-SR and 10gbase-lx4. Why IEEE 802.3aq creates another multi

first, the definition of direct linear transformation method is to establish the "coordinate instrument coordinate" of the image point and the direct linear relation of the object square coordinate of the corresponding point. Features of the direct linear transformation solution:Non-centring, indefinite items do not require an internal and external azimuth element The starting value of the object square space need to arrange a set of control points is particularly suitable for dealing with non-m

with single-mode fiber, because of the low active + passive integrated cost of multimode fiber, it will make multimode fiber have the absolute advantage in the application of data center, and more than 85% of the fiber cabling system in large and medium data center adopts multimode fiber. August 2009, TIA officially approved OM4, a new category Eia/tia492aaad Multimode optical fiber standards for the introduction of multimode fiber in the future a large number of applications to provide a good

also the time for the popularization and application of optical fiber systems. In addition, in horizontal optical fiber cabling, the more expensive OM3 10-Gigabit optical fiber is not required, and the cheaper OM2 gigabit optical fiber can be used, because one is that our horizontal cabling distance is no more than 90 meters, and the other is the application of the new Ethernet 10-Gigabit Optical Fiber standard 10GBASE-LRM), so that our

single-mode fiber and multimode fiberSingle-mode fiber and multimode fiber are the most common classification methods. Single-mode fiber is a * * *, multimode fiber is orange.Single mode fiber is generally divided into: conventional single-mode fiber and dispersion-shifted fiber.There are 3 common multimode fiber types:OM1,OM2 and OM3. OM1 multimode optical fibers are not included in ITU-T recommendations

constrain, different room requirements so the designer of the computer room in the wiring system design, more need is based on different system requirements and integrated cost control to rationalize the design. selection of cable in different computer room according to Tia 942-2005, the following transmission level of integrated wiring products can be used in the computer room: CAT6 type horizontal twisted pair; Cat 6A, CAT7 copper cabling System, OM