查看 TiDB 运行 内存快照分析

[tidb@dev10 ~]$ yum install -y golang

[tidb@dev10 ~]$ go tool pprof 192.168.180.33:10080/debug/pprof/heap

[tidb@dev10 ~]$ curl -G 192.168.180.33:10080/debug/pprof/heap > heap.profile
[tidb@dev10 ~]$[tidb@dev10 ~]$ go tool pprof heap.profileFile: tidb-serverBuild ID: 40bee8740e5b8cb4930a3d0efa0fa7231d2e8116Type: inuse_spaceTime: Sep 18, 2019 at 3:55pm (CST)Entering interactive mode (type "help" for commands, "o" for options)(pprof)(pprof) top 10Showing nodes accounting for 154.68MB, 79.82% of 193.79MB totalDropped 77 nodes (cum <= 0.97MB)Showing top 10 nodes out of 174      flat  flat%   sum%        cum   cum%      96MB 49.54% 49.54%       96MB 49.54%  github.com/pingcap/tidb/store/tikv/latch.NewLatches   15.99MB  8.25% 57.79%    15.99MB  8.25%  github.com/pingcap/tidb/util/arena.NewAllocator    9.66MB  4.98% 62.77%     9.66MB  4.98%  bufio.NewReaderSize    8.06MB  4.16% 66.93%     8.06MB  4.16%  github.com/pingcap/tidb/statistics.NewCMSketch    6.60MB  3.41% 70.34%     6.60MB  3.41%  github.com/pingcap/parser.New    4.06MB  2.10% 72.43%     4.06MB  2.10%  bufio.NewWriterSize    3.72MB  1.92% 74.36%     3.72MB  1.92%  google.golang.org/grpc/internal/transport.newBufWriter    3.59MB  1.85% 76.21%     7.60MB  3.92%  github.com/pingcap/tidb/util/chunk.(*column).appendBytes    3.50MB  1.81% 78.01%    14.55MB  7.51%  github.com/pingcap/tidb/statistics/handle.(*Handle).initStatsHistograms4Chunk    3.50MB  1.81% 79.82%     3.50MB  1.81%  reflect.New(pprof)

[root@dev11 ~]# free -h              total        used        free      shared  buff/cache   availableMem:            15G        6.3G        7.8G         81M        1.6G         13GSwap:            0B          0B          0B[root@dev11 ~]#