CODEWITHSUNDEEP
node.js
anil
anil

Reputation: 863

how to increase nodejs default memory?

On Server startup exporting 2GB(Approximately) data from mongodb to redis,then getting error as FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - process out of memory.

Then started server with this command node --max-old-space-size=4076 server.js and works fine. But needs to configure in nodejs applicaton so that node server always starts with 4gb memory. Please help me how to fix this? Thanks.

Upvotes: 66

Views: 134221

Answers (5)

Nigrimmist
Nigrimmist

Reputation: 12368

If you want to increase the memory usage of the node globally, you can export environment variable, like this:

export NODE_OPTIONS=--max_old_space_size=4096

or 8GB:

export NODE_OPTIONS=--max_old_space_size=8192

Upvotes: 9

M T Head
M T Head

Reputation: 1290

node --max-old-space-size=8192 some-script.js
  • Where SomeScript is the file name that you want to execute using node.

Upvotes: 64

Prashant K
Prashant K

Reputation: 909

There are two ways to resolve this, First way is to set memory size explicitly for your application, already answered above. And the other way is to set memory size globally for node - This is done by creating an Environment variable, with 

variable name=NODE_OPTIONS

and 

variable value=--max-old-space-size=4096

Upvotes: 5

Kevin Cooper
Kevin Cooper

Reputation: 5375

You can also set NODE_OPTIONS when running an npm script rather than node itself:

"scripts": {
  "start": "NODE_OPTIONS=--max-old-space-size=4096 serve",
},

Upvotes: 32

James LeClair
James LeClair

Reputation: 1294

one option: npm start scripts

https://docs.npmjs.com/misc/scripts

These are added to your package.json under the "scripts" section

{
  //other package.json stuff

  "scripts":{
     "start": "node --max-old-space-size=4076 server.js"
  } 

}

then to run it call npm start instead of typing in node + args + execution point.

Note: if you name it something other than start, npm run [yourScriptNameHere] will be the command to run it

This is a better option than trying to reconfigure node to use 4gb by default (don't even know if its possible tbh). It makes your configuration portable by using the baked in methods as it stands and allows others who encounter your code in the future to understand this is a need.

Upvotes: 37

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