out all running goroutines ● Before the unit test runs, remembers all running goroutines ● After the unit test is finished, if there are any new goroutines, that are leaked goroutines func TestT(t *testing

generate a title 1. "Getting Started with Go: A Beginner's Guide" 2. "Concurrency in Go: Mastering Goroutines and Channels" 3. "Building Scalable Microservices with Go" 4. "Effective Error Handling in Go: better) 1. "Deep Dive into Go's Garbage Collector: How It Works and How to Tune It" 2. "Mastering Goroutines: Patterns for Concurrent Programming in Go" 3. "Leveraging Go Interfaces for Flexible and Maintainable

it block all the callers ● The scheduler treat them equally Analysis ● Under heavy workload, goroutines get longer to be scheduled ● The runtime scheduling does not consider priority ● CPU dense workload Observation： A query is blocked by GC sweep Investigation ● The garbage collector can stop individual goroutines, even without STW ○ eg. A goroutine that needs to allocate memory right after a GC cycle is required

lines of Go code and 94 contributors. Goroutine • Starting a goroutine is easy and cheap. • Goroutines come with built-in primitives to communicate safely between themselves (channels). • Very easy

行的操作失败的次数，counter类型 • kubelet_pod_start_duration_seconds*：histogram类型，描述pod从pending 状态进入running状态花费的时间 • go_goroutines：kubelet的goroutine的数量 • kubelet_pleg_relist_duration_seconds*：histogram类型，pleg是Pod Lifecycle Event

per TiCDC node. • Memory usage: the memory usage per TiCDC node. • Goroutine count: the number of goroutines per TiCDC node. 11.1.5.2 Key metrics for TiCDC data replication 1406 11.1.5.2.1 TiCDC overall The time for which TiKV nodes and TiCDC nodes have been running • Goroutine count: The number of goroutines of a TiCDC node • Open FD count: The number of file handles opened by TiCDC nodes • Ownership: Configuration. ########################### Global config ######################### ### The number of goroutines created to check data. The number of �→ connections between sync-diff-inspector and upstream/downstream

per TiCDC node. • Memory usage: the memory usage per TiCDC node. • Goroutine count: the number of goroutines per TiCDC node. 11.1.5.2 Key metrics for TiCDC data replication 1414 11.1.5.2.1 TiCDC overall The time for which TiKV nodes and TiCDC nodes have been running • Goroutine count: The number of goroutines of a TiCDC node • Open FD count: The number of file handles opened by TiCDC nodes • Ownership: Configuration. ########################### Global config ######################### ### The number of goroutines created to check data. The number of �→ connections between sync-diff-inspector and upstream/downstream

per TiCDC node. • Memory usage: the memory usage per TiCDC node. • Goroutine count: the number of goroutines per TiCDC node. 11.1.10.2 Key metrics for TiCDC data replication 1527 11.1.10.2.1 TiCDC overall The time for which TiKV nodes and TiCDC nodes have been running • Goroutine count: The number of goroutines of a TiCDC node • Open FD count: The number of file handles opened by TiCDC nodes • Ownership: Configuration. ########################### Global config ######################### ### The number of goroutines created to check data. The number of �→ connections between sync-diff-inspector and upstream/downstream

per TiCDC node. • Memory usage: the memory usage per TiCDC node. • Goroutine count: the number of goroutines per TiCDC node. 11.1.5.2 Key metrics for TiCDC data replication 1403 11.1.5.2.1 TiCDC overall The time for which TiKV nodes and TiCDC nodes have been running • Goroutine count: The number of goroutines of a TiCDC node • Open FD count: The number of file handles opened by TiCDC nodes • Ownership: Configuration. ########################### Global config ######################### ### The number of goroutines created to check data. The number of �→ connections between sync-diff-inspector and upstream/downstream

The time for which TiKV nodes and TiCDC nodes have been running • Goroutine count: The number of goroutines of a TiCDC node • Open FD count: The number of file handles opened by TiCDC nodes • Ownership: per TiCDC node. • Memory usage: the memory usage per TiCDC node. • Goroutine count: the number of goroutines per TiCDC node. 11.1.10.2 Key metrics for TiCDC data replication 1825 11.1.10.2.1 TiCDC overall Configuration. ########################### Global config ######################### ### The number of goroutines created to check data. The number of �→ connections between sync-diff-inspector and upstream/downstream