Re: OSD's slow down to a crawl

[Mark Nelson <mark.nelson@inktank.com>]

Out of curiosity, if you fire up a rados bench instance on one of the 
nodes with say, 256 concurrent writes, do any of the writes complete?

Mark

On 12/20/2012 09:51 AM, Matthew Anderson wrote:
> Hi Mark,
>
> Thanks for the quick reply. The log was 380MB in total so I just posted last 200 lines hoping that a trained eye might be able to spot something. I'm happy to put the file up on a web server if anyone wants to review it in full.
>
> It doesn't appear to be memory or CPU related. In it's hung state (both read and write are not responding at the moment, I have a VM hung trying to shutdown and an rbd stuck exporting ) all of the OSD's sit around 0.3% CPU usage, ~300MB of ram and no IO wait. The server has roughly 40GB RAM free and is easily 90% idle. Iotop shows no IO coming from any of the Ceph-OSD's.
>
> The admin socket showed no ops in flight but the performance dump, perhistoric ops and config are below. I did notice that the age of some of the ops was quite high considering things were actively trying to write to the cluster.
> # ceph --admin-daemon ./ceph-osd.24.asok perf dump
>
> {"filestore":{"journal_queue_max_ops":500,"journal_queue_ops":0,"journal_ops":20868,"journal_queue_max_bytes":104857600,"journal_queue_bytes":0,"journal_bytes":1710397238,"journal_latency":{"avgcount":20868,"sum":185.268022000},"journal_wr":13354,"journal_wr_bytes":{"avgcount":13354,"sum":1770647552},"op_queue_max_ops":500,"op_queue_ops":0,"ops":20868,"op_queue_max_bytes":104857600,"op_queue_bytes":0,"bytes":1710232583,"apply_latency":{"avgcount":20868,"sum":508.896737000},"committing":0,"commitcycle":339,"commitcycle_interval":{"avgcount":339,"sum":1708.284725000},"commitcycle_latency":{"avgcount":339,"sum":13.241850000},"journal_full":0},"mutex-FileJournal::completions_lock":{"wait":{"avgcount":0,"sum":0.000000000}},"mutex-FileJournal::finisher_lock":{"wait":{"avgcount":0,"sum":0.00000
 0000}},"mutex-FileJournal::write_lock":{"wait":{"avgcount":0,"sum":0.000000000}},"mutex-FileJournal::writeq_lock":{"wait":{"avgcount":0,"sum":0.000000000}},"mutex-JOS::ApplyManager::apply_lock":{"wai
t":{"avgcount":0,"sum":0.000000000}},"mutex-JOS::ApplyManager::com_lock":{"wait":{"avgcount":0,"sum":0.000000000}},"mutex-JOS::SubmitManager::lock":{"wait":{"avgcount":0,"sum":0.000000000}},"osd":{"opq":0,"op_wip":0,"op":31753,"op_in_bytes":797806224,"op_out_bytes":1728414048,"op_latency":{"avgcount":31753,"sum":82.183373000},"op_r":24945,"op_r_out_bytes":1728414048,"op_r_latency":{"avgcount":24945,"sum":16.833689000},"op_w":6808,"op_w_in_bytes":797806224,"op_w_rlat":{"avgcount":6808,"sum":38.223006000},"op_w_latency":{"avgcount":6808,"sum":65.349684000},"op_rw":0,"op_rw_in_bytes":0,"op_rw_out_bytes":0,"op_rw_rlat":{"avgcount":0,"sum":0.000000000},"op_rw_latency":{"avgcount":0,"sum":0.000000000},"subop":5700,"subop_in_bytes":813224156,"subop_latency":{"avgcount":5700,"sum":26.877085000},"s
 ubop_w":0,"subop_w_in_bytes":813224156,"subop_w_latency":{"avgcount":5700,"sum":26.877085000},"subop_pull":0,"subop_pull_latency":{"avgcount":0,"sum":0.000000000},"subop_push":0,"subop_push_in_bytes"
:0,"subop_push_latency":{"avgcount":0,"sum":0.000000000},"pull":0,"push":0,"push_out_bytes":0,"push_in":0,"push_in_bytes":0,"recovery_ops":0,"loadavg":359,"buffer_bytes":0,"numpg":2486,"numpg_primary":1214,"numpg_replica":1272,"numpg_stray":0,"heartbeat_to_peers":4,"heartbeat_from_peers":0,"map_messages":44,"map_message_epochs":184,"map_message_epoch_dups":174},"throttle-filestore_bytes":{"val":0,"max":104857600,"get":0,"get_sum":0,"get_or_fail_fail":0,"get_or_fail_success":0,"take":20868,"take_sum":1710397238,"put":13354,"put_sum":1710397238,"wait":{"avgcount":0,"sum":0.000000000}},"throttle-filestore_ops":{"val":0,"max":500,"get":0,"get_sum":0,"get_or_fail_fail":0,"get_or_fail_success":0,"take":20868,"take_sum":20868,"put":13354,"put_sum":20868,"wait":{"avgcount":0,"sum":0.000000000}},"t
 hrottle-msgr_dispatch_throttler-client":{"val":0,"max":104857600,"get":31657,"get_sum":795546573,"get_or_fail_fail":0,"get_or_fail_success":0,"take":0,"take_sum":0,"put":31657,"put_sum":795546573,"wa
it":{"avgcount":0,"sum":0.000000000}},"throttle-msgr_dispatch_throttler-cluster":{"val":0,"max":104857600,"get":18913,"get_sum":828011293,"get_or_fail_fail":0,"get_or_fail_success":0,"take":0,"take_sum":0,"put":18913,"put_sum":828011293,"wait":{"avgcount":0,"sum":0.000000000}},"throttle-msgr_dispatch_throttler-hbclient":{"val":0,"max":104857600,"get":4260,"get_sum":200220,"get_or_fail_fail":0,"get_or_fail_success":0,"take":0,"take_sum":0,"put":4260,"put_sum":200220,"wait":{"avgcount":0,"sum":0.000000000}},"throttle-msgr_dispatch_throttler-hbserver":{"val":0,"max":104857600,"get":4236,"get_sum":199092,"get_or_fail_fail":0,"get_or_fail_success":0,"take":0,"take_sum":0,"put":4236,"put_sum":199092,"wait":{"avgcount":0,"sum":0.000000000}},"throttle-osd_client_bytes":{"val":0,"max":524288000,"ge
 t":31308,"get_sum":795353720,"get_or_fail_fail":0,"get_or_fail_success":0,"take":0,"take_sum":0,"put":37671,"put_sum":795353720,"wait":{"avgcount":0,"sum":0.000000000}}}
>
> # ceph --admin-daemon ./ceph-osd.24.asok dump_historic_ops
>
>         { "description": "osd_op(client.7636.0:101498 rb.0.122c.6b8b4567.000000000357 [write 3600384~4096] 6.42463fe3)",
>            "received_at": "2012-12-20 23:34:42.012131",
>            "age": "75.428051",
>            "duration": "0.009988",
>            "flag_point": "waiting for sub ops",
>            "client_info": { "client": "client.7636",
>                "tid": 101498},
>            "events": [
>                  { "time": "2012-12-20 23:34:42.012317",
>                    "event": "waiting_for_osdmap"},
>                  { "time": "2012-12-20 23:34:42.012425",
>                    "event": "reached_pg"},
>                  { "time": "2012-12-20 23:34:42.012678",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:34:42.012720",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:34:42.012815",
>                    "event": "sub_op_sent"},
>                  { "time": "2012-12-20 23:34:42.012958",
>                    "event": "commit_queued_for_journal_write"},
>                  { "time": "2012-12-20 23:34:42.013033",
>                    "event": "write_thread_in_journal_buffer"},
>                  { "time": "2012-12-20 23:34:42.013745",
>                    "event": "journaled_completion_queued"},
>                  { "time": "2012-12-20 23:34:42.013803",
>                    "event": "op_commit"},
>                  { "time": "2012-12-20 23:34:42.017414",
>                    "event": "sub_op_commit_rec"},
>                  { "time": "2012-12-20 23:34:42.022066",
>                    "event": "op_applied"},
>                  { "time": "2012-12-20 23:34:42.022119",
>                    "event": "done"}]},
>          { "description": "osd_sub_op_reply(client.7636.0:101498 6.1fe3 42463fe3\/rb.0.122c.6b8b4567.000000000357\/head\/\/6 [] ondisk, result = 0)",
>            "received_at": "2012-12-20 23:34:42.017048",
>            "age": "75.423134",
>            "duration": "0.000411",
>            "flag_point": "started",
>            "events": [
>                  { "time": "2012-12-20 23:34:42.017218",
>                    "event": "waiting_for_osdmap"},
>                  { "time": "2012-12-20 23:34:42.017363",
>                    "event": "reached_pg"},
>                  { "time": "2012-12-20 23:34:42.017401",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:34:42.017459",
>                    "event": "done"}]},
>          { "description": "osd_op(client.7636.0:101502 rb.0.122c.6b8b4567.000000000064 [write 1512448~61440] 6.a241e34d)",
>            "received_at": "2012-12-20 23:34:49.851021",
>            "age": "67.589161",
>            "duration": "0.007114",
>            "flag_point": "waiting for sub ops",
>            "client_info": { "client": "client.7636",
>                "tid": 101502},
>            "events": [
>                  { "time": "2012-12-20 23:34:49.851276",
>                    "event": "waiting_for_osdmap"},
>                  { "time": "2012-12-20 23:34:49.851429",
>                    "event": "reached_pg"},
>                  { "time": "2012-12-20 23:34:49.851616",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:34:49.851648",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:34:49.851712",
>                    "event": "sub_op_sent"},
>                  { "time": "2012-12-20 23:34:49.851770",
>                    "event": "commit_queued_for_journal_write"},
>                  { "time": "2012-12-20 23:34:49.851915",
>                    "event": "write_thread_in_journal_buffer"},
>                  { "time": "2012-12-20 23:34:49.853956",
>                    "event": "journaled_completion_queued"},
>                  { "time": "2012-12-20 23:34:49.853992",
>                    "event": "op_commit"},
>                  { "time": "2012-12-20 23:34:49.857016",
>                    "event": "sub_op_commit_rec"},
>                  { "time": "2012-12-20 23:34:49.858077",
>                    "event": "op_applied"},
>                  { "time": "2012-12-20 23:34:49.858135",
>                    "event": "done"}]},
>          { "description": "osd_sub_op_reply(client.7636.0:101502 6.234d a241e34d\/rb.0.122c.6b8b4567.000000000064\/head\/\/6 [] ondisk, result = 0)",
>            "received_at": "2012-12-20 23:34:49.856762",
>            "age": "67.583420",
>            "duration": "0.000308",
>            "flag_point": "started",
>            "events": [
>                  { "time": "2012-12-20 23:34:49.856869",
>                    "event": "waiting_for_osdmap"},
>                  { "time": "2012-12-20 23:34:49.856969",
>                    "event": "reached_pg"},
>                  { "time": "2012-12-20 23:34:49.857001",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:34:49.857070",
>                    "event": "done"}]},
>          { "description": "osd_op(client.7636.0:101504 rb.0.122c.6b8b4567.00000000012c [write 1658880~2048] 6.92d2c38c)",
>            "received_at": "2012-12-20 23:35:34.351518",
>            "age": "23.088664",
>            "duration": "0.009430",
>            "flag_point": "waiting for sub ops",
>            "client_info": { "client": "client.7636",
>                "tid": 101504},
>            "events": [
>                  { "time": "2012-12-20 23:35:34.351714",
>                    "event": "waiting_for_osdmap"},
>                  { "time": "2012-12-20 23:35:34.351811",
>                    "event": "reached_pg"},
>                  { "time": "2012-12-20 23:35:34.352030",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:35:34.352071",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:35:34.352146",
>                    "event": "sub_op_sent"},
>                  { "time": "2012-12-20 23:35:34.352213",
>                    "event": "commit_queued_for_journal_write"},
>                  { "time": "2012-12-20 23:35:34.352287",
>                    "event": "write_thread_in_journal_buffer"},
>                  { "time": "2012-12-20 23:35:34.355390",
>                    "event": "journaled_completion_queued"},
>                  { "time": "2012-12-20 23:35:34.355475",
>                    "event": "op_commit"},
>                  { "time": "2012-12-20 23:35:34.356661",
>                    "event": "sub_op_commit_rec"},
>                  { "time": "2012-12-20 23:35:34.360894",
>                    "event": "op_applied"},
>                  { "time": "2012-12-20 23:35:34.360948",
>                    "event": "done"}]},
>          { "description": "osd_sub_op_reply(client.7636.0:101504 6.38c 92d2c38c\/rb.0.122c.6b8b4567.00000000012c\/head\/\/6 [] ondisk, result = 0)",
>            "received_at": "2012-12-20 23:35:34.356286",
>            "age": "23.083896",
>            "duration": "0.000421",
>            "flag_point": "started",
>            "events": [
>                  { "time": "2012-12-20 23:35:34.356489",
>                    "event": "waiting_for_osdmap"},
>                  { "time": "2012-12-20 23:35:34.356598",
>                    "event": "reached_pg"},
>                  { "time": "2012-12-20 23:35:34.356640",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:35:34.356707",
>                    "event": "done"}]},
>          { "description": "osd_op(client.7636.0:101512 rb.0.122c.6b8b4567.000000000357 [write 3731456~4096] 6.42463fe3)",
>            "received_at": "2012-12-20 23:35:42.133103",
>            "age": "15.307079",
>            "duration": "0.008357",
>            "flag_point": "waiting for sub ops",
>            "client_info": { "client": "client.7636",
>                "tid": 101512},
>            "events": [
>                  { "time": "2012-12-20 23:35:42.133315",
>                    "event": "waiting_for_osdmap"},
>                  { "time": "2012-12-20 23:35:42.133427",
>                    "event": "reached_pg"},
>                  { "time": "2012-12-20 23:35:42.133684",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:35:42.133723",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:35:42.133796",
>                    "event": "sub_op_sent"},
>                  { "time": "2012-12-20 23:35:42.133908",
>                    "event": "commit_queued_for_journal_write"},
>                  { "time": "2012-12-20 23:35:42.133995",
>                    "event": "write_thread_in_journal_buffer"},
>                  { "time": "2012-12-20 23:35:42.136965",
>                    "event": "journaled_completion_queued"},
>                  { "time": "2012-12-20 23:35:42.137025",
>                    "event": "op_commit"},
>                  { "time": "2012-12-20 23:35:42.138456",
>                    "event": "sub_op_commit_rec"},
>                  { "time": "2012-12-20 23:35:42.141408",
>                    "event": "op_applied"},
>                  { "time": "2012-12-20 23:35:42.141460",
>                    "event": "done"}]},
>          { "description": "osd_sub_op_reply(client.7636.0:101512 6.1fe3 42463fe3\/rb.0.122c.6b8b4567.000000000357\/head\/\/6 [] ondisk, result = 0)",
>            "received_at": "2012-12-20 23:35:42.138087",
>            "age": "15.302095",
>            "duration": "0.000410",
>            "flag_point": "started",
>            "events": [
>                  { "time": "2012-12-20 23:35:42.138248",
>                    "event": "waiting_for_osdmap"},
>                  { "time": "2012-12-20 23:35:42.138363",
>                    "event": "reached_pg"},
>                  { "time": "2012-12-20 23:35:42.138443",
>                    "event": "started"},
>                  { "time": "2012-12-20 23:35:42.138497",
>                    "event": "done"}]}]}
>
>     # ceph --admin-daemon ./ceph-osd.24.asok config show
> { "name": "osd.24",
>    "cluster": "ceph",
>    "none": "0\/5",
>    "lockdep": "0\/1",
>    "context": "0\/1",
>    "crush": "1\/1",
>    "mds": "1\/5",
>    "mds_balancer": "1\/5",
>    "mds_locker": "1\/5",
>    "mds_log": "1\/5",
>    "mds_log_expire": "1\/5",
>    "mds_migrator": "1\/5",
>    "buffer": "0\/1",
>    "timer": "0\/1",
>    "filer": "0\/1",
>    "striper": "0\/1",
>    "objecter": "0\/1",
>    "rados": "0\/5",
>    "rbd": "0\/5",
>    "journaler": "0\/5",
>    "objectcacher": "0\/5",
>    "client": "0\/5",
>    "osd": "0\/5",
>    "optracker": "0\/5",
>    "objclass": "0\/5",
>    "filestore": "1\/3",
>    "journal": "1\/3",
>    "ms": "0\/5",
>    "mon": "1\/5",
>    "monc": "0\/10",
>    "paxos": "0\/5",
>    "tp": "0\/5",
>    "auth": "1\/5",
>    "crypto": "1\/5",
>    "finisher": "1\/1",
>    "heartbeatmap": "1\/5",
>    "perfcounter": "1\/5",
>    "rgw": "1\/5",
>    "hadoop": "1\/5",
>    "javaclient": "1\/5",
>    "asok": "1\/5",
>    "throttle": "1\/1",
>    "host": "KVM04",
>    "fsid": "00000000-0000-0000-0000-000000000000",
>    "public_addr": ":\/0",
>    "cluster_addr": ":\/0",
>    "public_network": "",
>    "cluster_network": "",
>    "num_client": "1",
>    "monmap": "",
>    "mon_host": "",
>    "lockdep": "false",
>    "admin_socket": "\/var\/run\/ceph\/ceph-osd.24.asok",
>    "daemonize": "true",
>    "pid_file": "\/var\/run\/ceph\/osd.24.pid",
>    "chdir": "\/",
>    "max_open_files": "0",
>    "fatal_signal_handlers": "true",
>    "log_file": "\/var\/log\/ceph\/osd.24.log",
>    "log_max_new": "1000",
>    "log_max_recent": "100000",
>    "log_to_stderr": "false",
>    "err_to_stderr": "true",
>    "log_to_syslog": "false",
>    "err_to_syslog": "false",
>    "log_flush_on_exit": "true",
>    "clog_to_monitors": "true",
>    "clog_to_syslog": "false",
>    "mon_cluster_log_to_syslog": "false",
>    "mon_cluster_log_file": "\/var\/log\/ceph\/ceph.log",
>    "key": "",
>    "keyfile": "",
>    "keyring": "\/srv\/ceph\/osd\/osd.24\/keyring",
>    "heartbeat_interval": "5",
>    "heartbeat_file": "",
>    "perf": "true",
>    "ms_tcp_nodelay": "true",
>    "ms_initial_backoff": "0.2",
>    "ms_max_backoff": "15",
>    "ms_nocrc": "false",
>    "ms_die_on_bad_msg": "false",
>    "ms_dispatch_throttle_bytes": "104857600",
>    "ms_bind_ipv6": "false",
>    "ms_bind_port_min": "6800",
>    "ms_bind_port_max": "7100",
>    "ms_rwthread_stack_bytes": "1048576",
>    "ms_tcp_read_timeout": "900",
>    "ms_inject_socket_failures": "0",
>    "ms_inject_delay_type": "",
>    "ms_inject_delay_max": "1",
>    "ms_inject_delay_probability": "0",
>    "mon_data": "\/var\/lib\/ceph\/mon\/ceph-24",
>    "mon_initial_members": "",
>    "mon_sync_fs_threshold": "5",
>    "mon_tick_interval": "5",
>    "mon_subscribe_interval": "300",
>    "mon_osd_laggy_halflife": "3600",
>    "mon_osd_laggy_weight": "0.3",
>    "mon_osd_adjust_heartbeat_grace": "true",
>    "mon_osd_adjust_down_out_interval": "true",
>    "mon_osd_auto_mark_in": "false",
>    "mon_osd_auto_mark_auto_out_in": "true",
>    "mon_osd_auto_mark_new_in": "true",
>    "mon_osd_down_out_interval": "300",
>    "mon_osd_min_up_ratio": "0.3",
>    "mon_osd_min_in_ratio": "0.3",
>    "mon_lease": "5",
>    "mon_lease_renew_interval": "3",
>    "mon_lease_ack_timeout": "10",
>    "mon_clock_drift_allowed": "0.05",
>    "mon_clock_drift_warn_backoff": "5",
>    "mon_accept_timeout": "10",
>    "mon_pg_create_interval": "30",
>    "mon_pg_stuck_threshold": "300",
>    "mon_osd_full_ratio": "0.95",
>    "mon_osd_nearfull_ratio": "0.85",
>    "mon_globalid_prealloc": "100",
>    "mon_osd_report_timeout": "900",
>    "mon_force_standby_active": "true",
>    "mon_min_osdmap_epochs": "500",
>    "mon_max_pgmap_epochs": "500",
>    "mon_max_log_epochs": "500",
>    "mon_max_osd": "10000",
>    "mon_probe_timeout": "2",
>    "mon_slurp_timeout": "10",
>    "mon_slurp_bytes": "262144",
>    "mon_client_bytes": "104857600",
>    "mon_daemon_bytes": "419430400",
>    "mon_max_log_entries_per_event": "4096",
>    "paxos_max_join_drift": "10",
>    "paxos_propose_interval": "1",
>    "paxos_min_wait": "0.05",
>    "clock_offset": "0",
>    "auth_cluster_required": "none",
>    "auth_service_required": "none",
>    "auth_client_required": "none",
>    "auth_supported": "none",
>    "cephx_require_signatures": "false",
>    "cephx_sign_messages": "true",
>    "auth_mon_ticket_ttl": "43200",
>    "auth_service_ticket_ttl": "3600",
>    "mon_client_hunt_interval": "3",
>    "mon_client_ping_interval": "10",
>    "mon_client_max_log_entries_per_message": "1000",
>    "mon_max_pool_pg_num": "65536",
>    "client_cache_size": "16384",
>    "client_cache_mid": "0.75",
>    "client_use_random_mds": "false",
>    "client_mount_timeout": "30",
>    "client_tick_interval": "1",
>    "client_trace": "",
>    "client_readahead_min": "131072",
>    "client_readahead_max_bytes": "0",
>    "client_readahead_max_periods": "4",
>    "client_snapdir": ".snap",
>    "client_mountpoint": "\/",
>    "client_notify_timeout": "10",
>    "client_caps_release_delay": "5",
>    "client_oc": "true",
>    "client_oc_size": "209715200",
>    "client_oc_max_dirty": "104857600",
>    "client_oc_target_dirty": "8388608",
>    "client_oc_max_dirty_age": "5",
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>    "mds_standby_for_rank": "-1",
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>    "osd_auto_upgrade_tmap": "true",
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>    "osd_backfill_retry_interval": "10",
>    "osd_uuid": "00000000-0000-0000-0000-000000000000",
>    "osd_data": "\/srv\/ceph\/osd\/osd.24",
>    "osd_journal": "\/dev\/sda3",
>    "osd_journal_size": "5120",
>    "osd_max_write_size": "90",
>    "osd_max_pgls": "1024",
>    "osd_client_message_size_cap": "524288000",
>    "osd_pg_bits": "6",
>    "osd_pgp_bits": "6",
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>    "osd_pool_default_pg_num": "8",
>    "osd_pool_default_pgp_num": "8",
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>    "osd_map_cache_size": "500",
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>    "osd_op_threads": "2",
>    "osd_disk_threads": "1",
>    "osd_recovery_threads": "1",
>    "osd_recover_clone_overlap": "true",
>    "osd_backfill_scan_min": "64",
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>    "osd_snap_trim_thread_timeout": "3600",
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>    "osd_remove_thread_timeout": "3600",
>    "osd_command_thread_timeout": "600",
>    "osd_age": "0.8",
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>    "osd_heartbeat_addr": ":\/0",
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>    "osd_mon_ack_timeout": "30",
>    "osd_min_down_reporters": "1",
>    "osd_min_down_reports": "3",
>    "osd_default_data_pool_replay_window": "45",
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>    "osd_scrub_min_interval": "300",
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>    "osd_deep_scrub_interval": "604800",
>    "osd_deep_scrub_stride": "524288",
>    "osd_auto_weight": "false",
>    "osd_class_dir": "\/usr\/local\/lib\/rados-classes",
>    "osd_check_for_log_corruption": "false",
>    "osd_use_stale_snap": "false",
>    "osd_rollback_to_cluster_snap": "",
>    "osd_default_notify_timeout": "30",
>    "osd_kill_backfill_at": "0",
>    "osd_min_pg_log_entries": "1000",
>    "osd_op_complaint_time": "30",
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>    "osd_debug_drop_pg_create_probability": "0",
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>    "osd_op_history_size": "20",
>    "osd_op_history_duration": "600",
>    "osd_target_transaction_size": "300",
>    "osd_client_op_priority": "63",
>    "osd_recovery_op_priority": "10",
>    "filestore": "false",
>    "filestore_index_retry_probability": "0",
>    "filestore_debug_omap_check": "false",
>    "filestore_xattr_use_omap": "false",
>    "filestore_max_inline_xattr_size": "512",
>    "filestore_max_inline_xattrs": "2",
>    "filestore_max_sync_interval": "5",
>    "filestore_min_sync_interval": "0.01",
>    "filestore_btrfs_snap": "true",
>    "filestore_btrfs_clone_range": "true",
>    "filestore_fsync_flushes_journal_data": "false",
>    "filestore_fiemap": "false",
>    "filestore_flusher": "true",
>    "filestore_flusher_max_fds": "512",
>    "filestore_flush_min": "65536",
>    "filestore_sync_flush": "false",
>    "filestore_journal_parallel": "false",
>    "filestore_journal_writeahead": "false",
>    "filestore_journal_trailing": "false",
>    "filestore_queue_max_ops": "500",
>    "filestore_queue_max_bytes": "104857600",
>    "filestore_queue_committing_max_ops": "500",
>    "filestore_queue_committing_max_bytes": "104857600",
>    "filestore_op_threads": "2",
>    "filestore_op_thread_timeout": "60",
>    "filestore_op_thread_suicide_timeout": "180",
>    "filestore_commit_timeout": "600",
>    "filestore_fiemap_threshold": "4096",
>    "filestore_merge_threshold": "10",
>    "filestore_split_multiple": "2",
>    "filestore_update_to": "1000",
>    "filestore_blackhole": "false",
>    "filestore_dump_file": "",
>    "filestore_kill_at": "0",
>    "filestore_fail_eio": "true",
>    "journal_dio": "true",
>    "journal_aio": "false",
>    "journal_block_align": "true",
>    "journal_max_write_bytes": "10485760",
>    "journal_max_write_entries": "100",
>    "journal_queue_max_ops": "500",
>    "journal_queue_max_bytes": "104857600",
>    "journal_align_min_size": "65536",
>    "journal_replay_from": "0",
>    "journal_zero_on_create": "false",
>    "rbd_cache": "false",
>    "rbd_cache_size": "33554432",
>    "rbd_cache_max_dirty": "25165824",
>    "rbd_cache_target_dirty": "16777216",
>    "rbd_cache_max_dirty_age": "1",
>    "nss_db_path": "",
>    "rgw_data": "\/var\/lib\/ceph\/radosgw\/ceph-24",
>    "rgw_enable_apis": "s3, swift, swift_auth, admin",
>    "rgw_cache_enabled": "true",
>    "rgw_cache_lru_size": "10000",
>    "rgw_socket_path": "",
>    "rgw_dns_name": "",
>    "rgw_swift_url": "",
>    "rgw_swift_url_prefix": "swift",
>    "rgw_swift_auth_url": "",
>    "rgw_swift_auth_entry": "auth",
>    "rgw_keystone_url": "",
>    "rgw_keystone_admin_token": "",
>    "rgw_keystone_accepted_roles": "Member, admin",
>    "rgw_keystone_token_cache_size": "10000",
>    "rgw_keystone_revocation_interval": "900",
>    "rgw_admin_entry": "admin",
>    "rgw_enforce_swift_acls": "true",
>    "rgw_swift_token_expiration": "86400",
>    "rgw_print_continue": "true",
>    "rgw_remote_addr_param": "REMOTE_ADDR",
>    "rgw_op_thread_timeout": "600",
>    "rgw_op_thread_suicide_timeout": "0",
>    "rgw_thread_pool_size": "100",
>    "rgw_num_control_oids": "8",
>    "rgw_cluster_root_pool": ".rgw.root",
>    "rgw_log_nonexistent_bucket": "false",
>    "rgw_log_object_name": "%Y-%m-%d-%H-%i-%n",
>    "rgw_log_object_name_utc": "false",
>    "rgw_usage_max_shards": "32",
>    "rgw_usage_max_user_shards": "1",
>    "rgw_enable_ops_log": "true",
>    "rgw_enable_usage_log": "true",
>    "rgw_ops_log_rados": "true",
>    "rgw_ops_log_socket_path": "",
>    "rgw_ops_log_data_backlog": "5242880",
>    "rgw_usage_log_flush_threshold": "1024",
>    "rgw_usage_log_tick_interval": "30",
>    "rgw_intent_log_object_name": "%Y-%m-%d-%i-%n",
>    "rgw_intent_log_object_name_utc": "false",
>    "rgw_init_timeout": "30",
>    "rgw_mime_types_file": "\/etc\/mime.types",
>    "rgw_gc_max_objs": "32",
>    "rgw_gc_obj_min_wait": "7200",
>    "rgw_gc_processor_max_time": "3600",
>    "rgw_gc_processor_period": "3600",
>    "rgw_s3_success_create_obj_status": "0",
>    "rgw_resolve_cname": "false",
>    "rgw_obj_stripe_size": "4194304",
>    "rgw_extended_http_attrs": "",
>    "mutex_perf_counter": "false",
>    "internal_safe_to_start_threads": "true"}
>
>
> -----Original Message-----
> From: Mark Nelson [mailto:mark.nelson@inktank.com]
> Sent: Thursday, 20 December 2012 11:28 PM
> To: Matthew Anderson
> Cc: ceph-devel@vger.kernel.org
> Subject: Re: OSD's slow down to a crawl
>
> Hi Matt,
>
> Yeah, your log is looking pretty sparse!  I imagine Sam will have a lot of questions for you.  Out of curiosity have you looked at any io/cpu/memory stats when things slow down?  sysprof may come in handy if it looks like it's CPU related.  Also, check out the OSD admin socket.
> Sebastien Han made a nice little blog entry describing it:
>
> http://www.sebastien-han.fr/blog/2012/08/14/ceph-admin-socket/
>
> You can get a lot of information about the current state of things.
>
> Mark
>