ED_Alloc: no free edicts means your Team Fortress 2 server has exhausted its entity slots. Find whether a map starts near the limit or a plugin steadily creates entities, then remove unnecessary entities or repair the cleanup code. A limiter can stop the crash and trigger recovery, but it cannot increase the engine’s entity capacity.
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What “ED_Alloc: no free edicts” means
Source-engine servers represent map objects, props, effects and scripted objects as edicts (entity slots). When the game needs to create another entity, the allocator scans for a slot marked free. If it reaches the configured maximum without finding one, it emits ED_Alloc: no free edicts and the server can crash.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsThe allocator’s lifecycle explains why cleanup fixes the underlying problem. When an entity is removed, the engine’s ED_Free path marks that edict free so a later spawn can reuse it. A server that keeps creating temporary entities without freeing them eventually has no reusable slot left, even if the current map does not appear unusually busy.
A hosting knowledgebase documents a failure log containing Total edicts: 2049 followed by Engine error: ED_Alloc: no free edicts. It identifies the dynamic-entity limit as the cause and gives point_spotlight and func_brush as examples of entities that can consume slots. Engineering documentation for the TF2 Edict Limiter project describes the engine maximum as 2,048 edicts. These figures come from different documents and should be treated as diagnostic references rather than a Valve specification for every current TF2 build.
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When the crash happens tells you where to look
- During map load: The map’s baked entities, server-side additions loaded immediately, or both are already close to the ceiling.
- At round start or after a reset: A plugin may spawn a batch of props, lights, particle systems or scripted entities for each round and fail to remove the previous batch.
- Only after players have been active for a while: A steadily increasing count is a strong indication of a creation or cleanup leak.
- After one particular event: Note the event precisely. A kill streak, boss spawn, map objective or admin command can identify the plugin callback that creates the excess entities.
Do not assume that the class with the largest count is automatically defective. A map may legitimately contain many instances of one class; the useful signal is the count’s change over time and whether it tracks a specific map or plugin event.
Collect evidence before changing the server
Preserve the complete console and server log from the first warning through the crash. Record the map, player count, round state, recently changed plugins and the last visible event. Keeping the original log matters because a restart erases the growth pattern that distinguishes a map problem from a runtime leak.
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- Reproduce with a minimal plugin set. Disable nonessential SourceMod plugins, restart, and load the map that normally fails. If the error disappears, re-enable plugins in small groups rather than all at once.
- Capture a baseline entity count. With the TF2 Edict Limiter installed, run
sm_edictcountfrom the server console or an authorized admin console. Record the result immediately after map load, at round start and after the event that usually precedes the crash. - Classify the entities. Run
sm_spewedictsto dump classname counts. The project’s example output includes classes such asprop_dynamicandambient_generic; your own output may be different. - Compare maps. Load a known-good map and the suspected map with the same plugin set. A high, repeatable count on one map points toward map-authored entities. A count that starts similar but climbs during play points toward a plugin or cleanup failure.
- Correlate counts with changes. Compare the first failing build with the last known-good map or plugin revision. Test one change at a time so you can identify the cause instead of merely moving the crash to a later round.
How to read the count and classname dump
| Observed pattern | Most likely lead | Next check |
|---|---|---|
| High count immediately after loading one map; stable thereafter | Map-authored dynamic entities or a map-specific configuration | Inspect the map’s entity list and test a replacement or rebuilt version |
| Similar starting count on several maps, then continuous growth | Plugin repeatedly creating entities or failing to free temporary ones | Disable plugin groups and capture counts after each event or round |
| Large increase only when cosmetics, lights or effects are enabled | Optional visual or scripted additions consuming slots | Disable those additions and measure the count again |
| Count falls after a map change or restart but rises again in the same session | Stale allocations are released by the transition; the runtime cause remains | Audit round-end and map-end cleanup in the responsible plugin |
| One classname dominates but count does not increase | Possibly legitimate map content, not necessarily a leak | Compare against another map and inspect when the class is created |
Use the dump to narrow the search, not to declare a class guilty by itself. Entity ownership may be indirect: a plugin can create a generic prop or sound entity in response to an event, while the map supplies a similarly named class for legitimate gameplay.
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Fix map-authored entity pressure
Remove nonessential entities
If the failure occurs during map load and the count is stable during play, remove decorative or redundant dynamic entities from the map. Typical candidates include excess props, lights, spotlights, ambient sounds and scripted helpers that do not affect the objective or collision. Keep a backup of the original map and document every removal so gameplay changes can be reversed.
Recompile or replace the map
When the map source is available, make the entity reduction in the source and recompile it; editing only a running server’s state will not permanently change the map. If you cannot safely rebuild it, use a tested replacement map or a version with fewer dynamic additions. Verify spawns, triggers, navigation, objectives and performance after the change, because deleting an entity that appears cosmetic can still remove a required relay or brush.
Reduce optional map packs
Custom lighting, prop and scripted packs often add entities beyond the base map. Disable one pack at a time, compare sm_edictcount after load, and retain only the additions that provide a clear gameplay benefit. Do not treat a lower count alone as proof of correctness; play through the affected objectives and watch for missing logic.
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Fix plugin-created entities and cleanup leaks
Identify the plugin that changes the count
With a baseline recorded, enable plugins in small groups. After each group, load the test map, start a round, trigger the suspected event and run sm_edictcount again. Once a group produces growth, split it into individual plugins and repeat. This binary-style isolation is faster and produces a defensible before-and-after record.
Audit creation and removal paths
For the responsible plugin, inspect every code path that creates an entity. Temporary props, particle systems, sounds and logic entities need a matching removal path when an effect ends, a player disconnects, a round resets and the map changes. Also handle early exits and failed creation calls; otherwise a partially initialized object can remain tracked incorrectly or a later callback can create another copy.
Update, configure or replace the plugin
Check whether a maintained release fixes entity cleanup, then test that release on staging. If an update is unavailable, turn off the feature that creates the objects, lower its spawn frequency or replace the plugin with one that performs cleanup. Do not leave a known leak enabled merely because a restart temporarily restores capacity.
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Clean at lifecycle boundaries
Plugins should remove temporary entities at round transitions and map transitions, not only when an effect reports success. Ensure timers, repeating callbacks and handles are cancelled as part of the same cleanup routine. After deploying a fix, monitor counts across several rounds and a complete map change; a single successful round is not enough evidence.
Restarting the server: useful recovery, not a cure
A restart or map change releases edicts that the old process or map still holds, so it is an appropriate emergency recovery step after removing the offending content. It does not correct a map that always loads near the limit or a plugin that leaks on every round. If the count begins climbing again under normal play, return to isolation and code cleanup instead of increasing restart frequency.
For production operations, schedule a controlled map change or restart after deploying a fix, announce the interruption to players, and confirm that the new process loads with the expected baseline. Keep the pre-fix logs so you can verify that the growth pattern is gone rather than merely delayed.
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Use the TF2 Edict Limiter as a guardrail
The TF2 Edict Limiter is a SourceMod plugin ported for TF2. Its purpose is to prevent the final allocation attempt when the number of free edicts falls below a configured threshold. Its README documents a default threshold of eight edicts and provides two diagnostic commands:
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sm_edictcountreports current usage.sm_spewedictsprints classname counts for investigation.
Depending on its configuration, the limiter can take no action, prevent a spawn, attempt a restart, restart the map, move to the next map or emit an edict dump. Choose the least disruptive action that protects the server while you investigate. Spawn prevention may preserve uptime but can make a plugin feature fail visibly; an automatic map restart is more disruptive but can recover a public server without an administrator present.
This is a safety net, not additional capacity. Blocking entity creation can expose assumptions in improperly coded plugins, which may throw errors when a spawn fails. Test the limiter with every entity-creating plugin enabled and watch the logs for handled and unhandled failures. Keep the threshold and action in your server configuration so an update or plugin reinstall does not silently remove the protection.
Choose a remedy by what it changes
| Remedy | Reduces current use? | Preserves features? | Automation or measurement | Operational work |
|---|---|---|---|---|
| Delete unnecessary map entities | Yes | Only if removed objects are nonessential | None; verify with counts | Map edit and usually a recompile or replacement |
| Repair or replace a leaking plugin | Yes, after deployment | Usually the best long-term preservation | Requires testing and monitoring | Plugin configuration or code change |
| Disable cosmetic or scripted additions | Yes | Reduces visual or scripted features | Measure before and after | Configuration change and gameplay validation |
| Restart or change maps | Temporarily | Interrupts the session | Can be scheduled as recovery | Does not remove the underlying cause |
| Install and configure an edict limiter | No; it protects the remaining slots | May block a feature when the threshold is reached | Counts, dumps and configurable recovery actions | SourceMod installation, compatibility testing and policy choice |
A practical recovery runbook
- Stop the crash loop. Change to a safe map or restart once so administrators can work without repeated failures.
- Save evidence. Archive the complete log and note the map, round, player count, recent changes and the last successful count.
- Measure. On a staging server, run
sm_edictcountat load, round start and after the triggering event; runsm_spewedictswhen the count is high. - Isolate. Compare the suspected map with a known-good map and use a minimal plugin set. Re-enable plugins in small groups.
- Apply the narrowest permanent fix. Remove nonessential map entities, repair or replace the leaking plugin, or disable the optional feature responsible for growth.
- Validate lifecycle behavior. Play several rounds, force the event repeatedly, change maps and confirm the count returns to a stable range instead of climbing each cycle.
- Add protection. Configure the limiter with a tested threshold and recovery action, and monitor its logs for blocked spawns or plugin errors.
- Deploy and document. Record the map or plugin version, configuration change, baseline count and rollback procedure so the next update can be checked quickly.
Prevention checklist for administrators
- Keep a baseline edict count for each heavily customized map.
- Recheck counts after adding props, lighting, sounds, scripted objectives or cosmetic systems.
- Review plugin release notes for entity-spawn and cleanup changes before updating on production.
- Test round resets, player disconnects, failed effects and map transitions, not only the normal success path.
- Alert on a sustained upward count or a low-free-edict threshold rather than waiting for the crash message.
- Use a staging server to test TF2 updates and SourceMod plugin compatibility.
- Keep the original map and plugin files so a rollback is immediate.
Limits of the available guidance
The mechanism is supported by open-source engine allocator code, a community TF2 limiter README and a hosting-provider troubleshooting page. Those sources explain slot exhaustion and practical diagnosis, but they do not establish a Valve-published entity-limit specification for every current TF2 build. Treat the documented 2,048 maximum and the 2,049 example as useful references, confirm behavior on the exact server build you run, and retest after TF2 or SourceMod updates.
The reliable principle is unchanged: count and classify entities, determine whether the map or runtime creates them, remove or free what is unnecessary, and use a limiter only to keep the final allocation from taking the server down while the root cause is fixed.
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