OpenClaw Memory & Semantic Search
Configure memory and semantic search in OpenClaw so your agents remember context, find past work, and stop repeating the same questions. Includes fixes for context overflow, embedding rate limits, and memory that vanishes after restart.
What Is Memory in OpenClaw?
Memory in OpenClaw stores useful context that your agent can reuse later. It can include:
- Project rules
- User preferences
- Client requirements
- Previous decisions
- Workflow instructions
- Repeated task formats
- Important summaries
Example: if you tell OpenClaw, "For this client, always send short weekly updates," memory helps the agent remember that preference in future tasks. Without memory, the agent may forget instructions, repeat questions, or lose important context during long workflows. Very impressive technology, until it forgets what you said five minutes ago.
What Is Semantic Search in OpenClaw?
Semantic search helps OpenClaw find saved information by meaning, not just exact words. For example, if you search pricing issue, semantic search may also find related notes about:
- Billing problem
- Invoice error
- Subscription failure
- Payment dispute
This is useful when your OpenClaw workspace has notes, documents, support history, research, or previous workflow outputs. Pair it with the research assistant setup to make past work easier to reuse.
Why Memory & Semantic Search Matter in OpenClaw
OpenClaw is more useful when it can work with past context.
| Without memory & search | With memory & search |
|---|---|
| Forgets previous decisions | Recalls saved instructions |
| Repeats the same questions | Searches previous notes |
| Loses context in long conversations | Reuses project knowledge |
| Misses project-specific rules | Improves workflow consistency |
| Returns generic answers | Reduces repeated prompting |
| Breaks multi-step workflows | Handles longer-running tasks reliably |
For real workflows, memory is not a luxury. It is the difference between an agent and a goldfish with API access.
Common Memory & Semantic Search Problems
You may need to fix your OpenClaw memory setup if you see issues like:
- OpenClaw forgets previous messages
- Memory files are not saving
- Semantic search returns weak results
- Context overflow errors appear
- Embedding provider hits rate limits
- Memory disappears after gateway restart
- Voice messages fail when memory is enabled
- Search results are outdated or irrelevant
- Agent says old messages were compacted or forgotten
These problems usually come from configuration, storage, gateway, embedding, or context settings.
Common Error Messages
Context overflow: prompt too large for the modelNo API key found for providerMemory file not foundSemantic search failedEmbedding provider rate limit reachedMessages were compacted
You may also see silent problems - an empty memory folder, ignored old context, or search results that look completely unrelated. Because naturally, the worst bugs do not even introduce themselves.
Before You Configure Memory
Before changing memory settings, check that your basic OpenClaw setup works. You need OpenClaw installed or hosted, the gateway running, a working AI model configured, memory enabled, a storage path available, enough disk space, correct file permissions, and an embedding provider selected for semantic search.
openclaw gateway status openclaw --version openclaw configure --get features.memory ls -la ~/.openclaw/memory/ df -h ~/.openclaw/| Command | Purpose |
|---|---|
openclaw gateway status | Checks if the gateway is running |
openclaw --version | Shows installed OpenClaw version |
openclaw configure --get features.memory | Checks if memory is enabled |
ls -la ~/.openclaw/memory/ | Checks memory files and permissions |
df -h ~/.openclaw/ | Checks available disk space |
If the gateway is down, fix that first. Memory cannot work properly when the service responsible for writing and reading context is not running. Shocking, yes.
How to Enable Memory in OpenClaw
Start with basic memory before enabling semantic search.
Step 1: Open Memory Configuration
openclaw configure --section memoryStep 2: Enable Memory
Set memory to enabled in your OpenClaw configuration:
{
"features": {
"memory": true
}
}Step 3: Restart the Gateway
openclaw gateway restartStep 4: Test Memory
Send this test prompt:
Remember that this OpenClaw workspace is used for customer support automation.
Then ask:
What is this OpenClaw workspace used for?
If OpenClaw recalls the saved context, basic memory is working.
How to Configure Semantic Search in OpenClaw
Semantic search needs embeddings. Embeddings convert text into searchable meaning so OpenClaw can find related content later.
- Embedding provider
- Embedding model
- API key or local endpoint
- Search result limit
- Minimum relevance score
- Chunk size
- Metadata fields
- Index location or vector database
{
"memorySearch": {
"enabled": true,
"provider": "local",
"query": {
"maxResults": 5,
"minScore": 0.75
}
}
}After changing semantic search settings, restart the gateway:
openclaw gateway restartThen test with a prompt like "Search previous notes for anything related to customer refund policy." Good results should be relevant, specific, and tied to saved context.
Skip the memory setup pain.
Managed OpenClaw on Ampere.sh runs the gateway, models, storage, and embeddings so memory and semantic search work on day one - no permission errors, no vanishing context after restart.
Fix Context Overflow in OpenClaw
A common memory error is Context overflow: prompt too large for the model. This happens when OpenClaw sends too much context to the model.
- Start a new session:
/new - Reset the current session:
/reset - Reduce semantic search results:
{
"memorySearch": {
"query": {
"maxResults": 3,
"minScore": 0.8
}
}
}contextTokensmaxResultsminScorecontextPruningttlkeepLastAssistantscompaction
Best practice: do not inject every old memory into every prompt. That is not intelligence. That is hoarding with JSON. If cost is also a concern, review the token usage and cost guide.
Fix Memory Files Not Saving
If memory is enabled but files are not saving, check the gateway, folder, permissions, and disk space.
openclaw gateway status
ls -la ~/.openclaw/memory/
df -hIf permissions are wrong, fix them:
chmod -R u+rw ~/.openclaw/memory/
openclaw gateway restart| Problem | Cause | Fix |
|---|---|---|
| Empty memory folder | Gateway not running | Restart gateway |
| Permission denied | Folder not writable | Fix permissions |
| No new files | Memory disabled | Enable memory |
| Save fails | Disk full | Free disk space |
| Wrong path | Bad config | Check memory path |
For Windows users, also check folder path format and file permissions.
Fix Semantic Search Rate Limits
Semantic search may fail if your embedding provider hits rate limits. Common error: Embedding provider rate limit reached.
Reduce search result count:
{
"memorySearch": {
"query": {
"maxResults": 3
}
}
}Or disable semantic search temporarily:
{
"memorySearch": {
"enabled": false
}
}Then restart:
openclaw gateway restart- Use fewer chunks
- Reduce indexing frequency
- Add retry/backoff settings
- Switch embedding provider
- Use local embeddings for testing
- Use a paid provider for production
If semantic search is central to your workflow, do not build it on a provider limit that collapses the moment your agent does real work. Bold strategy, terrible outcome.
Fix Weak or Irrelevant Search Results
If semantic search returns poor results, the problem is usually not OpenClaw itself. It is usually bad indexing.
- Chunks are too large
- Chunks are too small
- No metadata
- Old index is not updated
- Wrong embedding model
- Search result limit is too high
- Minimum relevance score is too low
- Re-index documents
- Add metadata
- Improve chunk size
- Increase
minScore - Remove outdated memory
- Separate projects or workspaces
- Test with real user queries
{
"memorySearch": {
"query": {
"maxResults": 5,
"minScore": 0.78
}
}
}Fix Context Loss After Gateway Restart
If OpenClaw loses memory after a restart, check whether memory files exist and whether the gateway is crashing.
openclaw gateway logs --lines 200
journalctl -u openclaw --since "24 hours ago" | tail -50
dmesg | grep -i "killed process"
ls -la ~/.openclaw/memory/| Cause | Fix |
|---|---|
| Gateway crashed | Check logs and restart |
| VPS ran out of RAM | Add swap or upgrade server |
| Memory path changed | Correct config path |
| Files not persisted | Use persistent storage |
| Service user lacks permission | Fix ownership/permissions |
If you run OpenClaw on a small VPS, memory and semantic search can fail when the server runs out of RAM. Upgrade the VPS or use managed hosting if you need reliable always-on workflows. See running OpenClaw 24/7.
Fix Voice Message Issues When Memory Is Enabled
In some setups, voice messages may fail when experimental session memory is enabled.
- Voice message is ignored
- Transcription works but no reply appears
- Text input works but voice input fails
- Bot stops responding after voice input
Disable experimental session memory:
{
"memorySearch": {
"experimental": {
"sessionMemory": false
}
}
}Restart the gateway:
openclaw gateway restartThen test text input first. After text works, test voice input again. Also check your transcription provider settings if voice still fails.
Recommended OpenClaw Memory Configuration
Use this as a safe starting point and adjust based on your setup:
{
"features": {
"memory": true
},
"memorySearch": {
"enabled": true,
"provider": "local",
"query": {
"maxResults": 5,
"minScore": 0.75
},
"experimental": {
"sessionMemory": false
}
},
"context": {
"pruning": "cache-ttl",
"ttl": "24h",
"compaction": "archive"
}
}After applying changes:
openclaw gateway restartThis setup keeps memory enabled, limits retrieval size, avoids overly aggressive context injection, and disables experimental session memory if it causes issues.
Test Your Memory and Semantic Search Setup
After configuration, test in three parts.
1. Memory Test
Remember that this OpenClaw workspace is used for customer support automation.
Then ask: What is this OpenClaw workspace used for?
2. Semantic Search Test
Search previous notes for anything related to refund policy.
3. Context Test
Use the saved project rules and summarize the next action.
A good setup should return answers that are relevant, short, source-aware, consistent, and based on saved context. If the result is vague or unrelated, fix chunking, metadata, provider settings, or index quality.
When to Use Managed OpenClaw Hosting
Use managed OpenClaw hosting when you want to run OpenClaw reliably without spending time on server setup, gateway issues, storage paths, or uptime problems.
- You want OpenClaw running 24/7 for real workflows
- You do not want to manage VPS setup, ports, or background services
- Your memory and semantic search setup needs stable storage
- You want fewer gateway crashes and manual restarts
- You are connecting tools like Telegram, WhatsApp, Discord, Slack, or webhooks
- You need workflows to keep running even when your local machine is off
- You want to avoid debugging embedding, memory, and file permission issues
- You are moving from testing OpenClaw to using it for actual work
For local experiments, manual setup is fine. For always-on agents, connected tools, memory, and semantic search, managed hosting is usually the cleaner path. With Ampere.sh, you can run OpenClaw without handling server maintenance, uptime monitoring, ports, storage setup, or backend configuration yourself.
Frequently Asked Questions
Why is OpenClaw memory not saving?
How do I fix context overflow in OpenClaw?
Why is semantic search returning irrelevant results?
Do I need embeddings for semantic search?
Should I use local or hosted embeddings?
Is managed hosting better for OpenClaw memory setup?
Also Read
Memory and semantic search that just work
Managed OpenClaw on Ampere.sh handles storage, embeddings, and the gateway so recall works from day one - no config archaeology required.
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