Why does my Valheim server freeze when multiple players are building simultaneously?

Valheim is a cooperative survival game where players can build, explore, and fight together in a procedurally generated world. However, when multiple players are building simultaneously on a server, the game may freeze or lag due to the strain on the server''s resources. This issue is particularly common in densely built areas or when complex structures are being constructed. Understanding the game mechanics and optimizing your server setup can help mitigate these problems.\n\nOne of the primary reasons for server freezes during multiplayer building is the game''s reliance on server-side calculations for structural integrity and physics. Every time a player places or removes a building piece, the server must recalculate the stability of nearby structures. When multiple players are building at the same time, these calculations can overwhelm the server, especially if it lacks sufficient processing power or memory. This is more likely to occur in biomes like the Meadows or Plains, where players often build large bases with intricate designs.\n\nTo reduce the likelihood of freezes, consider limiting the number of players building simultaneously in the same area. For example, if four players are working on a large base, assign specific sections to each player to minimize overlapping construction. Additionally, avoid placing too many building pieces in a small area, as this can increase the computational load. If you''re building in a biome with limited resources, such as the Black Forest, plan your structures carefully to avoid unnecessary complexity.\n\nAnother solution is to optimize your server settings. If you''re hosting a dedicated server, ensure that it has sufficient RAM and CPU resources to handle multiple players. Lowering the server''s tick rate can also help reduce strain, though this may slightly impact gameplay responsiveness. For players using a peer-to-peer setup, consider switching to a dedicated server for better performance. Dedicated servers are particularly useful for large-scale projects, such as building a massive fortress in the Mountains biome.\n\nIn-game, you can also take steps to improve performance. For instance, avoid using too many decorative items like torches or banners, as these can increase the server''s workload. Instead, focus on functional building pieces like walls, roofs, and floors. If you''re experiencing frequent freezes, try breaking down unnecessary structures or simplifying your designs. For example, replace complex roof patterns with flat roofs to reduce the number of calculations required.\n\nFinally, ensure that all players have a stable internet connection. Lag or packet loss can exacerbate server freezes, especially during intensive activities like building. If you''re playing with friends from different regions, consider using a server located centrally to minimize latency. Additionally, close any background applications that may be consuming bandwidth or processing power.\n\nBy understanding the game mechanics and taking proactive steps to optimize your server and building practices, you can reduce the likelihood of freezes during multiplayer building sessions. Whether you''re a new player constructing your first longhouse or an experienced Viking designing a sprawling castle, these tips will help ensure a smoother and more enjoyable experience.