Recently coming from an OpenElec/PlexBMC combo, I too have noticed this with my NAS and Raspberry Pi 2. My PMS logs show this type of activity every couple of minutes when Rasplex is not being actively used. Is this intended behavior?
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac2c3ff700] DEBUG - Auth: Refreshing tokens inside the token-based authentication filter.
Apr 12, 2016 08:01:38 [0x7fac2c3ff700] DEBUG - HTTP requesting GET https://plex.tv/servers/cf5e4999ff26f1eb63ee5a9171ff69addeec081d/access_tokens.xml?includeProfiles=1&auth_token=xxxxxxxxxxxxxxxxxxxx
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - It took 0.0 sec to serialize a list with 7 elements.
Apr 12, 2016 08:01:38 [0x7fac447ff700] DEBUG - Completed: [192.168.1.161:47405] GET /library/sections (5 live) TLS 6ms 3854 bytes 206
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Request: [192.168.1.161:47405] GET /playlists/all?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - It took 0.0 sec to serialize a list with 0 elements.
Apr 12, 2016 08:01:38 [0x7fac43ffe700] DEBUG - Completed: [192.168.1.161:47405] GET /playlists/all (5 live) TLS 2ms 318 bytes 206 (pipelined: 2)
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Request: [192.168.1.161:47405] GET /library/sections/8/prefs?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - It took 0.0 sec to serialize a list with 3 elements.
Apr 12, 2016 08:01:38 [0x7fac447ff700] DEBUG - Completed: [192.168.1.161:47405] GET /library/sections/8/prefs (5 live) TLS 2ms 1132 bytes 206 (pipelined: 3)
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Request: [192.168.1.161:47405] GET /library/sections/3/prefs?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - It took 0.0 sec to serialize a list with 3 elements.
Apr 12, 2016 08:01:38 [0x7fac43ffe700] DEBUG - Completed: [192.168.1.161:47405] GET /library/sections/3/prefs (5 live) TLS 1ms 1132 bytes 206 (pipelined: 4)
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Request: [192.168.1.161:47405] GET /library/sections/4/prefs?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - It took 0.0 sec to serialize a list with 3 elements.
Apr 12, 2016 08:01:38 [0x7fac447ff700] DEBUG - Completed: [192.168.1.161:47405] GET /library/sections/4/prefs (5 live) TLS 1ms 1132 bytes 206 (pipelined: 5)
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Request: [192.168.1.161:47405] GET /library/sections/5/prefs?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - It took 0.0 sec to serialize a list with 2 elements.
Apr 12, 2016 08:01:38 [0x7fac43ffe700] DEBUG - Completed: [192.168.1.161:47405] GET /library/sections/5/prefs (5 live) TLS 1ms 920 bytes 206 (pipelined: 6)
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Request: [192.168.1.161:47405] GET /library/sections/10/prefs?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - It took 0.0 sec to serialize a list with 3 elements.
Apr 12, 2016 08:01:38 [0x7fac447ff700] DEBUG - Completed: [192.168.1.161:47405] GET /library/sections/10/prefs (5 live) TLS 2ms 1132 bytes 206 (pipelined: 7)
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Request: [192.168.1.161:47405] GET /library/sections/2/prefs?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - It took 0.0 sec to serialize a list with 3 elements.
Apr 12, 2016 08:01:38 [0x7fac43ffe700] DEBUG - Completed: [192.168.1.161:47405] GET /library/sections/2/prefs (5 live) TLS 2ms 1132 bytes 206 (pipelined: 8)
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Request: [192.168.1.161:47405] GET /library/sections/1/prefs?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac34bfe700] DEBUG - It took 0.0 sec to serialize a list with 2 elements.
Apr 12, 2016 08:01:38 [0x7fac447ff700] DEBUG - Completed: [192.168.1.161:47405] GET /library/sections/1/prefs (5 live) TLS 2ms 920 bytes 206 (pipelined: 9)
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Request: [192.168.1.161:47405] GET /channels/all?X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: We found auth token (xxxxxxxxxxxxxxxxxxxx), enabling token-based authentication.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - Auth: Came in with a super-token, authorization succeeded.
Apr 12, 2016 08:01:38 [0x7fac27ffb700] DEBUG - It took 0.0 sec to serialize a list with 0 elements.
Apr 12, 2016 08:01:38 [0x7fac43ffe700] DEBUG - Completed: [192.168.1.161:47405] GET /channels/all (5 live) TLS 0ms 340 bytes 206 (pipelined: 10)
Apr 12, 2016 08:01:39 [0x7fac2c3ff700] DEBUG - MyPlex: Added 15 super-tokens.
Apr 12, 2016 08:02:09 [0x7fac277fa700] DEBUG - Request: [192.168.1.161:47406] GET /library/sections/1/arts?sort=random&X-Plex-Container-Size=50&X-Plex-Container-Start=0&X-Plex-Token=xxxxxxxxxxxxxxxxxxxx (5 live) TLS