BA
Better Auth•3w ago
craftzcode

Better Auth Error Session data is too large to store in the cookie

I'm always getting this error whenever I tried to sign up. 
# SERVER_ERROR:  [Error [BetterAuthError]: Session data is too large to store in the cookie. Please disable session cookie caching or reduce the size of the session data] {
  cause: undefined
}
# SERVER_ERROR:  [Error [BetterAuthError]: Session data is too large to store in the cookie. Please disable session cookie caching or reduce the size of the session data] {
  cause: undefined
}
Here's my auth instance 
import { db } from '@/db' // your drizzle instance
import { account, session, user, verification } from '@/db/schema/auth'

import { betterAuth } from 'better-auth'
import { drizzleAdapter } from 'better-auth/adapters/drizzle'

export const auth = betterAuth({
  database: drizzleAdapter(db, {
    provider: 'pg', // or "mysql", "sqlite"
    schema: {
      user,
      account,
      session,
      verification
    }
  }),
  emailAndPassword: {
    enabled: true,
    async sendResetPassword(data, request) {
      // Send an email to the user with a link to reset their password
    }
  },
  advanced: {
    generateId: false // Disable default id generation
  }
  session: {
    cookieCache: {
      enabled: true,
      maxAge: 5 * 60 // Cache duration in seconds
    }
  }
})
import { db } from '@/db' // your drizzle instance
import { account, session, user, verification } from '@/db/schema/auth'

import { betterAuth } from 'better-auth'
import { drizzleAdapter } from 'better-auth/adapters/drizzle'

export const auth = betterAuth({
  database: drizzleAdapter(db, {
    provider: 'pg', // or "mysql", "sqlite"
    schema: {
      user,
      account,
      session,
      verification
    }
  }),
  emailAndPassword: {
    enabled: true,
    async sendResetPassword(data, request) {
      // Send an email to the user with a link to reset their password
    }
  },
  advanced: {
    generateId: false // Disable default id generation
  }
  session: {
    cookieCache: {
      enabled: true,
      maxAge: 5 * 60 // Cache duration in seconds
    }
  }
})
Solution:
This occurs because the base64 of the profile picture is too large. You should upload the profile picture to a S3 bucket or cloudflare R2 and save only the id to the database / cookie
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3 Replies
Solution
Valardir
Valardir•3w ago
This occurs because the base64 of the profile picture is too large. You should upload the profile picture to a S3 bucket or cloudflare R2 and save only the id to the database / cookie
craftzcode
craftzcodeOP•3w ago
thank you so much, how did you know the profile picture is causing of this error? because you are correct I just converting the image into base64 for testing
Valardir
Valardir•3w ago
Once had the same issue, glad I could help you. Base64 is maybe the only reason a cookie can exceed the max size of 4096 bytes so it was likely the same issues what I had in the past. I recommend cloudflare btw. Just nice and for most use cases for free

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