Valheim server in restart loop since latest update?

Increasing numbers of users have been reporting that since the latest Valheim server version release their servers have been crashing and restarting over and over again, making the server unplayable.

The latest version of Valheim's server may require more RAM than previously expected. This appears to be down to the new world saving mechanism. Consider increasing the amount of RAM on your server.

Here is a quick summary of the issue as displayed on the command line:

ERROR: Shader Unlit/Color shader is not supported on this GPU (none of subshaders/fallbacks are suitable)
ERROR: Shader Lux Lit Particles/ Bumped shader is not supported on this GPU (none of subshaders/fallbacks are suitable)
Shader 'Lux Lit Particles/ Tess Bumped': fallback shader 'Lux Lit Particles/ Bumped Smoke' not found
WARNING: Shader Unsupported: 'Lux Lit Particles/ Tess Bumped' - All subshaders removed
WARNING: Shader Did you use #pragma only_renderers and omit this platform?
WARNING: Shader If subshaders removal was intentional, you may have forgotten turning Fallback off?
ERROR: Shader Lux Lit Particles/ Tess Bumped shader is not supported on this GPU (none of subshaders/fallbacks are suitable)
WARNING: Shader Unsupported: 'Lux Lit Particles/ Tess Bumped' - All subshaders removed
WARNING: Shader Did you use #pragma only_renderers and omit this platform?
WARNING: Shader If subshaders removal was intentional, you may have forgotten turning Fallback off?
Unloading 5 Unused Serialized files (Serialized files now loaded: 0) UnloadTime: 4.122397 ms
Only custom filters can be played. Please add a custom filter or an audioclip to the audiosource (Amb_MainMenu).
HDR Render Texture not supported, disabling HDR on reflection probe.
12/12/2022 09:57:17: Setting -savedir to: /crate
12/12/2022 09:57:17: Get create world world
12/12/2022 09:57:17: Using environment steamid 892970
12/12/2022 09:57:17: Using steam APPID:892970
[S_API] SteamAPI_Init(): Loaded local 'steamclient.so' OK.
CAppInfoCacheReadFromDiskThread took 0 milliseconds to initialize
Setting breakpad minidump AppID = 892970
[S_API FAIL] Tried to access Steam interface SteamNetworkingUtils003 before SteamAPI_Init succeeded.
12/12/2022 09:57:17: Server ID 90071992547409920
12/12/2022 09:57:17: Authentication:k_ESteamNetworkingAvailability_Waiting
12/12/2022 09:57:17: Steam game server initialized
12/12/2022 09:57:17: Using default prefs
12/12/2022 09:57:17: Valheim version:0.212.7
12/12/2022 09:57:17: Worldgenerator version setup:2
12/12/2022 09:57:17: Render threading mode:SingleThreaded
12/12/2022 09:57:17: Missing audio clip in music respawn
12/12/2022 09:57:17: Builder started
12/12/2022 09:57:18: Loaded localization CSV:localization language:English
12/12/2022 09:57:18: Loaded localization CSV:localization_extra language:English
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty.so
Fallback handler could not load library /crate/valheim_server_Data/Mono/party
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty.so
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty.so
Fallback handler could not load library /crate/valheim_server_Data/Mono/party
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty.so
Fallback handler could not load library /crate/valheim_server_Data/Mono/libparty
DllNotFoundException: party at (wrapper managed-to-native) PartyCSharpSDK.Interop.PFPInterop.PartyInitialize(byte[],PartyCSharpSDK.Interop.PARTY_HANDLE&)
at PartyCSharpSDK.SDK.PartyInitialize (System.String titleId, PartyCSharpSDK.PARTY_HANDLE& handle) [0x00006] in :0 at PlayFab.Party.PlayFabMultiplayerManager.InitializeImpl () [0x000be] in :0 at PlayFab.Party.PlayFabMultiplayerManager._Initialize () [0x0000a] in :0 at PlayFab.Party.PlayFabMultiplayerManager.Start () [0x00000] in :0
The shader Hidden/Dof/DepthOfFieldHdr (UnityEngine.Shader) on effect Main Camera (UnityStandardAssets.ImageEffects.DepthOfField) is not supported on this platform!
The image effect Main Camera (UnityStandardAssets.ImageEffects.DepthOfField) has been disabled as it's not supported on the current platform.
The shader Hidden/SunShaftsComposite (UnityEngine.Shader) on effect Main Camera (UnityStandardAssets.ImageEffects.SunShafts) is not supported on this platform!
The shader Hidden/SimpleClear (UnityEngine.Shader) on effect Main Camera (UnityStandardAssets.ImageEffects.SunShafts) is not supported on this platform!
The image effect Main Camera (UnityStandardAssets.ImageEffects.SunShafts) has been disabled as it's not supported on the current platform.
12/12/2022 09:57:18: Starting music menu
12/12/2022 09:57:18: UI Group status changed Menu = True

Unloading 19 unused Assets to reduce memory usage. Loaded Objects now: 135759.
Total: 59.123783 ms (FindLiveObjects: 4.024764 ms CreateObjectMapping: 13.138006 ms MarkObjects: 41.792267 ms DeleteObjects: 0.168295 ms)
Unloading 6 Unused Serialized files (Serialized files now loaded: 0)
UnloadTime: 11.291265 ms
HDR Render Texture not supported, disabling HDR on reflection probe.
HDR Render Texture not supported, disabling HDR on reflection probe.
12/12/2022 09:57:18: Using default prefs
12/12/2022 09:57:18: isModded: False
12/12/2022 09:57:18: Zonesystem Awake 613
12/12/2022 09:57:18: DungeonDB Awake 613
12/12/2022 09:57:18: Registering lobby
12/12/2022 09:57:18: Worldgenerator version setup:1
12/12/2022 09:57:20: Audioman already exist, destroying self
Unloading 100 unused Assets to reduce memory usage. Loaded Objects now: 140265.
Total: 73.895162 ms (FindLiveObjects: 3.837003 ms CreateObjectMapping: 11.638646 ms MarkObjects: 57.572926 ms DeleteObjects: 0.846076 ms)

In response to this issue we have been allocating extra RAM to Valheim servers reporting this issue,  and will continue to do so free of charge for all existing servers.

If your server is experiencing this issue please contact our team in Discord and we'll be happy to assist.