Go runtime related problems in TiDB production environment About me ● Arthur Mao(毛康力), Senior Engineer@PingCAP ● TiDB core developer (top3 contributor) ● GitBook about golang internals (@tiancaiamao) not exhausted, but where is the bottleneck? Description ● The table is wide in the customer environment ○ CPU usage is higher with less columns ● The deployment does not consider NUMA ○ CPU usage is

within each element of their programs, thus helping them to succeed in an increasingly complex environment. Agile has emerged as the leading industry software development methodology, and has seen growing Some practices can even be applied to non-IT acquisitions. Program managers should evaluate the environment, constraints, and objectives to determine the right structure and methods to apply. Agile requires offers a set of principles that can help reduce cycle times and risks to deliver IT in a complex environment. “The US joint force will be smaller and leaner. But its great strength will be that it will

. . 20 1.4.2 Authenticating at web service logon . . . . . . . . . . . . . . . . . . . . 21 2 Environment-specific notes 23 2.1 Using the object-oriented web service (OOWS) . . . . . . . . . . . . . . succeed, regardless of user name or password. This should of course not be used in a production environment. Generally, the mechanism by which clients are authenticated is configurable by way of the VBoxManage so make sure you test this before deploying it. One can override this behavior by setting the environment variable VBOX_PAM_ALLOW_INACTIVE which will suppress failures when unable to read the shadow pass-

. . 24 1.4.2 Authenticating at web service logon . . . . . . . . . . . . . . . . . . . . 25 2 Environment-specific notes 27 2.1 Using the object-oriented web service (OOWS) . . . . . . . . . . . . . . succeed, regardless of user name or password. This should of course not be used in a production environment. Generally, the mechanism by which clients are authenticated is configurable by way of the VBoxManage so make sure you test this before deploying it. One can override this behavior by setting the environment variable VBOX_PAM_ALLOW_INACTIVE which will suppress failures when unable to read the shadow pass-

. . 24 1.4.2 Authenticating at web service logon . . . . . . . . . . . . . . . . . . . . 25 2 Environment-specific notes 27 2.1 Using the object-oriented web service (OOWS) . . . . . . . . . . . . . . succeed, regardless of user name or password. This should of course not be used in a production environment. Generally, the mechanism by which clients are authenticated is configurable by way of the VBoxManage so make sure you test this before deploying it. One can override this behavior by setting the environment variable VBOX_PAM_ALLOW_INACTIVE which will suppress failures when unable to read the shadow pass-

. . 22 1.4.2 Authenticating at web service logon . . . . . . . . . . . . . . . . . . . . 23 2 Environment-specific notes 25 2.1 Using the object-oriented web service (OOWS) . . . . . . . . . . . . . . succeed, regardless of user name or password. This should of course not be used in a production environment. Generally, the mechanism by which clients are authenticated is configurable by way of the VBoxManage so make sure you test this before deploying it. One can override this behavior by setting the environment variable VBOX_PAM_ALLOW_INACTIVE which will suppress failures when unable to read the shadow pass-

. . 22 1.4.2 Authenticating at web service logon . . . . . . . . . . . . . . . . . . . . 23 2 Environment-specific notes 25 2.1 Using the object-oriented web service (OOWS) . . . . . . . . . . . . . . succeed, regardless of user name or password. This should of course not be used in a production environment. Generally, the mechanism by which clients are authenticated is configurable by way of the VBoxManage so make sure you test this before deploying it. One can override this behavior by setting the environment variable VBOX_PAM_ALLOW_INACTIVE which will suppress failures when unable to read the shadow pass-

. . . . . . . . . . . . . . . . . . . . . 363 28 Handling Operating System Variation 366 29 Environment Variables 367 29.1 File locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1364 78.4 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1364 78.5 Examples techniques make it possible to mostly eliminate the performance trade-off and provide a single environment productive enough for prototyping and efficient enough for deploying performance-intensive applications

. . . . . . . . . . . . . . . . . . . . . 363 28 Handling Operating System Variation 366 29 Environment Variables 367 29.1 File locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1364 78.4 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1364 78.5 Examples techniques make it possible to mostly eliminate the performance trade-off and provide a single environment productive enough for prototyping and efficient enough for deploying performance-intensive applications

. . . . . . . . . . . . . . . 385 29 Handling Operating System Variation 388CONTENTS vi 30 Environment Variables 389 30.1 File locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1596 80.4 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1596 80.5 Examples techniques make it possible to mostly eliminate the performance trade-off and provide a single environment productive enough for prototyping and efficient enough for deploying performance-intensive applications