Re: Tracing RocksDB Compaction

Hi All, Is there a way to get the exact time and size of each level compaction in RocksDB with BlueStore? My goal is to know when does compact triggered and which Transaction is compacted. I can use the rocksdb perf data, but it lacks the details info about each compaction. Below is an example of rocksdb perf data: "rocksdb_compaction_statistics": "", "": "", "": "** Compaction Stats [default] **", "": "Level Files Size Score Read(GB) Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) CompMergeCPU(sec) Comp(cnt) Avg(sec) KeyIn KeyDrop", "": "----------------------------------------------------------------------------------------------------------------------------------------------------------------------------", "": " L0 1/0 35.73 MB 0.2 0.0 0.0 0.0 0.2 0.2 0.0 1.0 0.0 80.0 3.02 2.55 8 0.377 0 0", "": " L1 2/0 83.15 MB 0.3 0.3 0.2 0.1 0.1 0.1 0.0 0.7 181.7 96.8 1.45 0.78 2 0.724 1429K 858K", "": " Sum 3/0 118.88 MB 0.0 0.3 0.2 0.1 0.4 0.3 0.0 1.6 58.9 85.5 4.47 3.33 10 0.447 1429K 858K", "": " Int 0/0 0.00 KB 0.0 0.3 0.2 0.1 0.4 0.3 0.0 1.6 58.9 85.5 4.47 3.33 9 0.496 1429K 858K", "": "", "": "** Compaction Stats [default] **", "": "Priority Files Size Score Read(GB) Rn(GB) Rnp1(GB) Write(GB) Wnew(GB) Moved(GB) W-Amp Rd(MB/s) Wr(MB/s) Comp(sec) CompMergeCPU(sec) Comp(cnt) Avg(sec) KeyIn KeyDrop", "": "-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------", "": " Low 0/0 0.00 KB 0.0 0.3 0.2 0.1 0.1 0.1 0.0 0.0 181.7 96.8 1.45 0.78 2 0.724 1429K 858K", "": "High 0/0 0.00 KB 0.0 0.0 0.0 0.0 0.2 0.2 0.0 0.0 0.0 80.1 3.02 2.55 7 0.431 0 0", "": "User 0/0 0.00 KB 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.00 0.00 1 0.001 0 0”, Thanks, Yiming _______________________________________________ Dev mailing list -- dev(a)ceph.io To unsubscribe send an email to dev-leave(a)ceph.io