I see the below in the system log (not sure if it's at that same moment as the freeze)...
Oct 29, 2016 07:40:19.167 [8756] WARN - Waited one whole second for a busy database.
Oct 29, 2016 07:40:19.249 [6604] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Oct 29, 2016 07:40:19.249 [6604] DEBUG - Auth: authenticated user 1 as mariod505
Oct 29, 2016 07:40:19.249 [6604] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Oct 29, 2016 07:40:19.249 [8764] DEBUG - Request: [192.168.1.203:43916 (Subnet)] GET /:/timeline?time=540000&duration=3010983&key=%2Flibrary%2Fmetadata%2F3130&ratingKey=3130&state=paused&guid=com.plexapp.agents.thetvdb%3A%2F%2F70522%2F1%2F19%3Flang%3Den&hasMDE=1&playQueueItemID=19233 (6 live) GZIP Signed-in Token (redacted)
Oct 29, 2016 07:40:19.249 [8764] DEBUG - Client [Plex12C29D012539] reporting timeline state paused, progress of 540000/3010983ms for guid=com.plexapp.agents.thetvdb://70522/1/19?lang=en, ratingKey=3130 url=, key=/library/metadata/3130, containerKey=, metadataId=3130
Oct 29, 2016 07:40:20.709 [8756] ERROR - Failed to begin transaction (C:\O\Statistics\StatisticsManager.h:183) (tries=1): Cannot begin transaction. database is locked
Oct 29, 2016 07:40:23.225 [8756] WARN - Waited one whole second for a busy database.
Oct 29, 2016 07:40:24.758 [8756] ERROR - Failed to begin transaction (C:\O\Statistics\StatisticsManager.h:183) (tries=2): Cannot begin transaction. database is locked
Oct 29, 2016 07:40:27.332 [8756] WARN - Waited one whole second for a busy database.
Oct 29, 2016 07:40:28.861 [8756] ERROR - Failed to begin transaction (C:\O\Statistics\StatisticsManager.h:183) (tries=3): Cannot begin transaction. database is locked
Oct 29, 2016 07:40:31.518 [8756] WARN - Waited one whole second for a busy database.
Oct 29, 2016 07:40:33.054 [8756] ERROR - Failed to begin transaction (C:\O\Statistics\StatisticsManager.h:183) (tries=4): Cannot begin transaction. database is locked
Oct 29, 2016 07:40:34.910 [8756] WARN - Waited one whole second for a busy database.
Oct 29, 2016 07:40:36.447 [8756] ERROR - Failed to begin transaction (C:\O\Statistics\StatisticsManager.h:183) (tries=5): Cannot begin transaction. database is locked
Oct 29, 2016 07:40:38.728 [8756] WARN - Waited one whole second for a busy database.
Is this normal activity or does it indicate an issue?
I also see some other errors in the log...
Oct 29, 2016 07:36:06.306 [5208] ERROR - Network Service: Error in browser handle read: 995 (The I/O operation has been aborted because of either a thread exit or an application request) socket=-1
...
Oct 29, 2016 07:36:13.654 [6960] WARN - NAT: PMP, got an error: NATPMP_ERR_RECVFROM.
...
Oct 29, 2016 07:46:58.339 [6604] ERROR - handle_stream_read error 2 End of file
Oct 29, 2016 07:46:58.339 [6604] WARN - LongPoll: Got error, closing.
Oct 29, 2016 07:46:58.339 [6600] DEBUG - WebSocket: client initiated close
Oct 29, 2016 07:46:58.339 [6600] DEBUG - WebSocket: processed 0 frame(s)
Oct 29, 2016 07:46:58.339 [6600] ERROR - handle_stream_read error 2 End of file
Oct 29, 2016 07:46:58.339 [6600] DEBUG - NotificationStream: Removing because of error
Oct 29, 2016 07:46:58.355 [6548] DEBUG - Request: [192.168.1.30:54362 (Subnet)] GET /web/css/main.11331b159ab56715f5956d4502a1d38f.css (5 live) GZIP Signed-in
Oct 29, 2016 07:50:12.111 [1348] ERROR - SetForegroundWindow failed: 0x0
Oct 29, 2016 07:50:12.111 [1348] ERROR - TrackPopupMenu failed: 0x5a6
Oct 29, 2016 07:50:12.188 [6900] ERROR - Soci Exception handled: sqlite3_statement_backend::loadOne: database is locked
Oct 29, 2016 07:58:06.244 [6604] DEBUG - WebSocket: client initiated close
Oct 29, 2016 07:58:06.244 [6604] DEBUG - WebSocket: processed 0 frame(s)
Oct 29, 2016 07:58:06.244 [6604] DEBUG - NotificationStream: Removing because of close
Oct 29, 2016 07:58:06.244 [6600] ERROR - handle_stream_read error 335544539 short read
Oct 29, 2016 07:58:07.943 [6600] DEBUG - WebSocket: client initiated close
Oct 29, 2016 07:58:07.944 [6600] DEBUG - WebSocket: processed 0 frame(s)
Oct 29, 2016 07:58:07.944 [6600] ERROR - handle_stream_read error 335544539 short read
Oct 29, 2016 07:58:07.944 [6600] DEBUG - NotificationStream: Removing because of error
etc... But it's mostly database locks...