My host has 256GB of ram.  62GB used under most heavy io workload.
_____________________________________________

*Tyler Bishop*
EST 2007


O: 513-299-7108 x1000
M: 513-646-5809
http://BeyondHosting.net <http://beyondhosting.net/>


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On Mon, Aug 27, 2018 at 10:36 PM Alfredo Daniel Rezinovsky <
alfredo.rezinov...@ingenieria.uncuyo.edu.ar> wrote:

> I had blockdb in ssd, with 3 OSDs per host (8G ram) and the default 3G
> bluestore_cache_size_ssd
>
> I stopped having inconsistencies dropping the cache to 1G.
>
> On 27/08/18 23:32, Tyler Bishop wrote:
>
> Having a constant segfault issue under io load with my newly created
> bluestore deployment.
>
> https://pastebin.com/82YjXRm7
>
> Setup is 28GB SSD LVM for block.db and 6T spinner for data.
>
> Config:
> [global]
> fsid =  REDACTED
> mon_initial_members = cephmon-1001, cephmon-1002, cephmon-1003
> mon_host = 10.20.142.5,10.20.142.6,10.20.142.7
> auth_cluster_required = cephx
> auth_service_required = cephx
> auth_client_required = cephx
> filestore_xattr_use_omap = true
>
> # Fixes issue where image is created with newer than supported features
> enabled.
> rbd_default_features = 3
>
>
> # Debug Tuning
> debug_lockdep = 0/0
> debug_context = 0/0
> debug_crush = 0/0
> debug_buffer = 0/0
> debug_timer = 0/0
> debug_filer = 0/0
> debug_objecter = 0/0
> debug_rados = 0/0
> debug_rbd = 0/0
> debug_journaler = 0/0
> debug_objectcatcher = 0/0
> debug_client = 0/0
> debug_osd = 0/0
> debug_optracker = 0/0
> debug_objclass = 0/0
> debug_filestore = 0/0
> debug_journal = 0/0
> debug_ms = 0/0
> debug_monc = 0/0
> debug_tp = 0/0
> debug_auth = 0/0
> debug_finisher = 0/0
> debug_heartbeatmap = 0/0
> debug_perfcounter = 0/0
> debug_asok = 0/0
> debug_throttle = 0/0
> debug_mon = 0/0
> debug_paxos = 0/0
> debug_rgw = 0/0
>
> [osd]
> osd_mkfs_type = xfs
> osd_mount_options_xfs =
> rw,noatime,,nodiratime,inode64,logbsize=256k,delaylog
> osd_mkfs_options_xfs = -f -i size=2048
> osd_journal_size = 10240
> filestore_queue_max_ops=1000
> filestore_queue_max_bytes = 1048576000
> filestore_max_sync_interval = 10
> filestore_merge_threshold = 500
> filestore_split_multiple = 100
> osd_op_shard_threads = 6
> journal_max_write_entries = 5000
> journal_max_write_bytes = 1048576000
> journal_queueu_max_ops = 3000
> journal_queue_max_bytes = 1048576000
> ms_dispatch_throttle_bytes = 1048576000
> objecter_inflight_op_bytes = 1048576000
> public network = 10.20.142.0/24
> cluster_network = 10.20.136.0/24
> osd_disk_thread_ioprio_priority = 7
> osd_disk_thread_ioprio_class = idle
> osd_max_backfills = 2
> osd_recovery_sleep = 0.10
>
>
> [client]
> rbd_cache = False
> rbd cache size = 33554432
> rbd cache target dirty = 16777216
> rbd cache max dirty = 25165824
> rbd cache max dirty age = 2
> rbd cache writethrough until flush = false
>
>
> --------
>
>
> 2018-08-28 02:31:30.961954 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/flush_job.cc:319]
> [default] [JOB 19] Level-0 flush table #688: 6121532 bytes OK
> 2018-08-28 02:31:30.962476 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_files.cc:242]
> adding log 681 to recycle list
>
> 2018-08-28 02:31:30.962495 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:31:30.961973)
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/memtable_list.cc:360]
> [default] Level-0 commit table #688 started
> 2018-08-28 02:31:30.962501 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:31:30.962413)
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/memtable_list.cc:383]
> [default] Level-0 commit table #688: memtable #1 done
> 2018-08-28 02:31:30.962505 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:31:30.962432) EVENT_LOG_v1 {"time_micros": 1535423490962423,
> "job": 19, "event": "flush_finished", "lsm_state": [1, 4, 1, 0, 0, 0, 0],
> "immutable_memtables": 0}
> 2018-08-28 02:31:30.962509 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:31:30.962458)
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_compaction_flush.cc:132]
> [default] Level summary: base level 1 max bytes base 268435456 files[1 4 1
> 0 0 0 0] max score 0.84
>
> 2018-08-28 02:31:30.962517 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_files.cc:388]
> [JOB 19] Try to delete WAL files size 258068015, prev total WAL file size
> 260608480, number of live WAL files 2.
>
> 2018-08-28 02:32:06.102335 7f64b917b700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_write.cc:684]
> reusing log 681 from recycle list
>
> 2018-08-28 02:32:06.102473 7f64b917b700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_write.cc:725]
> [default] New memtable created with log file: #689. Immutable memtables: 0.
>
> 2018-08-28 02:32:06.102542 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_compaction_flush.cc:49]
> [JOB 20] Syncing log #687
> 2018-08-28 02:32:06.103394 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:32:06.102527)
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_compaction_flush.cc:1158]
> Calling FlushMemTableToOutputFile with column family [default], flush slots
> available 1, compaction slots allowed 1, compaction slots scheduled 1
> 2018-08-28 02:32:06.103407 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/flush_job.cc:264]
> [default] [JOB 20] Flushing memtable with next log file: 689
>
> 2018-08-28 02:32:06.103435 7f64a895a700  4 rocksdb: EVENT_LOG_v1
> {"time_micros": 1535423526103422, "job": 20, "event": "flush_started",
> "num_memtables": 1, "num_entries": 97689, "num_deletes": 21335,
> "memory_usage": 260069984}
> 2018-08-28 02:32:06.103446 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/flush_job.cc:293]
> [default] [JOB 20] Level-0 flush table #690: started
> 2018-08-28 02:32:06.155755 7f64a895a700  4 rocksdb: EVENT_LOG_v1
> {"time_micros": 1535423526155726, "cf_name": "default", "job": 20, "event":
> "table_file_creation", "file_number": 690, "file_size": 6343137,
> "table_properties": {"data_size": 6153638, "index_size": 65232,
> "filter_size": 123278, "raw_key_size": 2289031, "raw_average_key_size": 52,
> "raw_value_size": 5374531, "raw_average_value_size": 122,
> "num_data_blocks": 1047, "num_entries": 43785, "filter_policy_name":
> "rocksdb.BuiltinBloomFilter", "kDeletedKeys": "21429", "kMergeOperands":
> "220"}}
> 2018-08-28 02:32:06.155776 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/flush_job.cc:319]
> [default] [JOB 20] Level-0 flush table #690: 6343137 bytes OK
> 2018-08-28 02:32:06.156214 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_files.cc:242]
> adding log 687 to recycle list
>
> 2018-08-28 02:32:06.156225 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:32:06.155790)
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/memtable_list.cc:360]
> [default] Level-0 commit table #690 started
> 2018-08-28 02:32:06.156229 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:32:06.156164)
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/memtable_list.cc:383]
> [default] Level-0 commit table #690: memtable #1 done
> 2018-08-28 02:32:06.156239 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:32:06.156178) EVENT_LOG_v1 {"time_micros": 1535423526156172,
> "job": 20, "event": "flush_finished", "lsm_state": [2, 4, 1, 0, 0, 0, 0],
> "immutable_memtables": 0}
> 2018-08-28 02:32:06.156244 7f64a895a700  4 rocksdb: (Original Log Time
> 2018/08/28-02:32:06.156199)
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_compaction_flush.cc:132]
> [default] Level summary: base level 1 max bytes base 268435456 files[2 4 1
> 0 0 0 0] max score 0.84
>
> 2018-08-28 02:32:06.156252 7f64a895a700  4 rocksdb:
> [/home/jenkins-build/build/workspace/ceph-build/ARCH/x86_64/AVAILABLE_ARCH/x86_64/AVAILABLE_DIST/centos7/DIST/centos7/MACHINE_SIZE/huge/release/12.2.7/rpm/el7/BUILD/ceph-12.2.7/src/rocksdb/db/db_impl_files.cc:388]
> [JOB 20] Try to delete WAL files size 257866117, prev total WAL file size
> 259275521, number of live WAL files 2.
>
>
>
> _____________________________________________
>
> *Tyler Bishop*
> EST 2007
>
>
> O: 513-299-7108 x1000
> M: 513-646-5809
> http://BeyondHosting.net <http://beyondhosting.net/>
>
>
> This email is intended only for the recipient(s) above and/or
> otherwise authorized personnel. The information contained herein and
> attached is confidential and the property of Beyond Hosting. Any
> unauthorized copying, forwarding, printing, and/or disclosing
> any information related to this email is prohibited. If you received this
> message in error, please contact the sender and destroy all copies of this
> email and any attachment(s).
>
>
> _______________________________________________
> ceph-users mailing 
> listceph-us...@lists.ceph.comhttp://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
>
> --
> Alfredo Daniel Rezinovsky
> Director de Tecnologías de Información y Comunicaciones
> Facultad de Ingeniería - Universidad Nacional de Cuyo
>
>
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