Upstash ERR Max Request Size Exceeded

How to fix it

// try these in order, the most common fix is first

1. FIX 1Split large writes into chunks

   Copy steps
   1. 01Break the value into pieces under 10MB (for example key:part:1, key:part:2)
   2. 02Write each piece with its own SET or pipeline entry
   3. 03Reassemble on read
   Did this fix it? Yes No

2. FIX 2Read big structures in pages

   Copy steps
   1. 01Use LRANGE with ranges (0-999, 1000-1999...) instead of 0 -1
   2. 02Use SCAN / HSCAN / SSCAN instead of KEYS, HGETALL or SMEMBERS on huge keys
   3. 03Split huge MGET calls into batches
   Did this fix it? Yes No

3. FIX 3Raise the limit

   Copy steps
   1. 01Fixed plans allow larger requests (20MB at 5GB up to 100MB at 500GB)
   2. 02On pay-as-you-go, email support@upstash.com to request a custom quota
   Did this fix it? Yes No

4. FIX 4Store big blobs elsewhere

   1. 01Put files or large payloads in object storage (S3, R2) and keep only the URL in Redis
   Did this fix it? Yes No

Symptoms

A specific write or read fails with 'ReplyError: ERR max request size exceeded', often on MGET of many keys, LRANGE 0 -1 on a big list, or SET of a large JSON blob.

Why it happens

• C-01One command writes or reads more than 10MB (Free / pay-as-you-go)
• C-02Fetching an entire large list, set or hash in one call
• C-03Caching whole API responses or files as one value

// this guide also covers

• upstash max request size exceeded
• err max request size exceeded
• failed to mget items upstash

Other Upstash errors

• Upstash ERR Max Requests Limit Exceeded
• Upstash Redis ECONNRESET Error
• Upstash WRONGPASS Invalid or Missing Auth Token
• Upstash ERR Max Concurrent Connections Exceeded
• Upstash Free Database Archived or Deleted
• Upstash Redis Slow or Timing Out
• QStash Signature Verification Failed (Invalid Signature)
• Upstash Ratelimit Not Working