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How Much RAM Does a Discord Bot Need?

How-toBy discordbothostUpdated 3 min read

The short answer: Measure your bot under real load before choosing memory. A small Node or Python bot often fits in a small container; Java, music, member caching and sharding need more headroom. Watch peak memory rather than averages, leave space outside the Java heap and increase the plan when sustained use approaches its limit.

What drives memory use

  • Runtime. Node.js and Python start small. The Java JVM reserves a heap up front, so JDA bots start bigger.
  • Caches. Libraries cache guilds, channels, members and messages. More servers and members means more cache.
  • Intents. The GUILD_MEMBERS and GUILD_PRESENCES intents bring in a lot of data. Ask only for what you use.
  • Features. Audio and music, image generation and big in-memory lists all add up.
  • Leaks. Arrays or maps that only ever grow will eventually reach any limit.

Rules of thumb by plan size

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Reference · Article updated
RAM256 MB512 MB1 GB2 GB
Typically fitsSmall Node or Python bot, few servers, light cachingBusier Node or Python bot; small JDA bot with a tuned heapJDA bots, bots in many servers, a database on the sideLarge or sharded bots, heavier processing
discordbothost planFreeStarter, $0.99/moPro, $1.99/moPlus, $3.49/mo

These are starting points, not guarantees. Watch your bot's graph.

How to measure

  1. Run the bot for a day under normal use.
  2. Watch peak memory, not the average. discordbothost shows live memory and CPU graphs on every plan.
  3. Pick a plan where the peak sits comfortably below the limit. When a container hits its limit, the process is killed, and that looks like the bot "randomly going offline".

Trimming memory

  • discord.js: set makeCache limits (for example, cap the message cache) and sweepers to clear old entries.
  • discord.py: set max_messages (or None) on the client, and turn off members intents if you don't need them.
  • JDA: use JDABuilder.createLight, turn off caches you don't use with disableCache, and set -Xmx (or -XX:MaxRAMPercentage=75) so the heap stays below the container limit.
  • Store growing data in a database rather than in memory. discordbothost Pro includes 1 database, and Plus includes 2.

Where discordbothost fits

discordbothost plans grow in simple steps: 256 MB free, then 512 MB for $0.99, 1 GB for $1.99, and 2 GB for $3.49 a month. Each plan has a hard disk quota and its own container, so other customers' bots can't eat your memory. Swap is off, so the limit you see is the limit you get.

Questions

Is 256 MB of RAM enough for a Discord bot?

For a small discord.js or discord.py bot in a handful of servers, usually yes. Java (JDA) bots, music bots and bots that cache many members usually need 512 MB to 1 GB or more. Measure your bot's memory rather than guessing.

Why does my Java Discord bot use so much memory?

The JVM reserves heap up front and grows it until the maximum heap size. Set the maximum heap (-Xmx or -XX:MaxRAMPercentage) below your container's limit, leaving room for non-heap memory.

How do I reduce my bot's memory use?

Request only the gateway intents you need, limit library caches (members, messages), avoid storing large data in memory, and use a database for anything that grows.

  1. 1https://discordbothost.com/pricing/

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