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

Firebird Interactive SQL Utility Kamala Vadlamani, Paul Vinkenoog, Norman Dunbar, Mark Rotteveel Version 1.0, 24 December 2021 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 10. Setting The ISC_USER And ISC_PASSWORD Environment Variables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 11. SQL Dialects. . Contents 3 Chapter 1. Introduction This manual provides reference material for the Firebird Interactive SQL Utility (isql), and instructions on how to use it to perform tasks within the database. 

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4. Interactive Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.2. Differences Between Batch And Interactive Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.3. Batch . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7.4. Errors In Batch Mode Swap To Interactive Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7.5. Potential

Script 436 Setting the Greenplum Database Timezone 437 Setting Greenplum Environment Variables 437 To set up the gpadmin environment for Greenplum Database 438 Next Steps 438 Allowing Client Connections Utilities 493 Greenplum Environment Variables 493 Required Environment Variables 493 GPHOME 493 PATH 494 LD_LIBRARY_PATH 494 MASTER_DATA_DIRECTORY 494 Optional Environment Variables 494 PGAPPNAME Client and Loader Tools 655 Prerequisites 655 Setting Up Your Greenplum Database Clients Runtime Environment 655 Running the Client and Loader Programs 656 Greenplum Database Documentation References 656

Greenplum Database Timezone 422 Setting Greenplum Environment Variables 422 VMware Tanzu Greenplum 6 Documentation VMware, Inc 17 To set up the gpadmin environment for Greenplum Database 423 Next Steps 423 Segment Host iptables Rules 473 Installation Management Utilities 473 Greenplum Environment Variables 474 Required Environment Variables 474 GPHOME 474 PATH 474 VMware Tanzu Greenplum 6 Documentation VMware, Inc 19 LD_LIBRARY_PATH 474 MASTER_DATA_DIRECTORY 475 Optional Environment Variables 475 PGAPPNAME 475 PGDATABASE 475 PGHOST 475 PGHOSTADDR 475 PGPASSWORD 475 PGPASSFILE 475 PGOPTIONS

Script 419 Setting the Greenplum Database Timezone 419 Setting Greenplum Environment Variables 420 To set up the gpadmin environment for Greenplum Database 420 Next Steps 421 Allowing Client Connections Utilities 471 Greenplum Environment Variables 471 Required Environment Variables 471 GPHOME 471 PATH 472 LD_LIBRARY_PATH 472 MASTER_DATA_DIRECTORY 472 Optional Environment Variables 472 PGAPPNAME Client and Loader Tools 629 Prerequisites 629 Setting Up Your Greenplum Database Clients Runtime Environment 630 Running the Client and Loader Programs 630 Greenplum Database Documentation References 631

with Greenplum 342 The Functional Unit 342 Deploying VMware Greenplum to an Existing vSphere Environment 342 Determining the RAID Type 343 vSAN ESA 343 vSAN OSA 343 Planning for a Deployment 343 Script 430 Setting the Greenplum Database Timezone 430 Setting Greenplum Environment Variables 431 To set up the gpadmin environment for Greenplum Database 431 Next Steps 432 Allowing Client Connections Utilities 497 Greenplum Environment Variables 497 Required Environment Variables 497 GPHOME 498 PATH 498 LD_LIBRARY_PATH 498 MASTER_DATA_DIRECTORY 498 Optional Environment Variables 498 PGAPPNAME

Script 411 Setting the Greenplum Database Timezone 412 Setting Greenplum Environment Variables 412 To set up the gpadmin environment for Greenplum Database 413 Next Steps 413 Allowing Client Connections Utilities 468 Greenplum Environment Variables 468 Required Environment Variables 469 GPHOME 469 PATH 469 LD_LIBRARY_PATH 469 MASTER_DATA_DIRECTORY 469 Optional Environment Variables 470 PGAPPNAME Client and Loader Tools 633 Prerequisites 633 Setting Up Your Greenplum Database Clients Runtime Environment 634 Running the Client and Loader Programs 634 Greenplum Database Documentation References 635

Script 356 Setting the Greenplum Database Timezone 356 Setting Greenplum Environment Variables 357 To set up the gpadmin environment for Greenplum Database 357 Next Steps 358 Allowing Client Connections Utilities 398 Greenplum Environment Variables 399 Required Environment Variables 399 GPHOME 399 PATH 399 LD_LIBRARY_PATH 399 MASTER_DATA_DIRECTORY 399 Optional Environment Variables 400 PGAPPNAME Client and Loader Tools 539 Prerequisites 539 Setting Up Your Greenplum Database Clients Runtime Environment 539 Running the Client and Loader Programs 540 VMware Tanzu Greenplum 6 Documentation VMware

Script 222 Setting the Greenplum Database Timezone 222 Setting Greenplum Environment Variables 222 To set up the gpadmin environment for Greenplum Database 223 VMware Greenplum 7 Documentation VMware by Installation Management Utilities 264 Greenplum Environment Variables 264 VMware Greenplum 7 Documentation VMware by Broadcom 9 Required Environment Variables 264 GPHOME 265 PATH 265 LD_LIBRARY_PATH LD_LIBRARY_PATH 265 COORDINATOR_DATA_DIRECTORY 265 Optional Environment Variables 265 PGAPPNAME 265 PGDATABASE 266 PGHOST 266 PGHOSTADDR 266 PGPASSWORD 266 PGPASSFILE 266 PGOPTIONS 266 PGPORT 266 PGUSER