rails assets pipeline “Cannot allocate memory - nodejs”

Question

we\'ve just upgraded to Rails 3.2.5 from Rails 3.0.7 and using the assets-pipeline compilation on the fly for the staging server, but some times we face this exception !

Answer 1

Based on the tutorial link provided by Kyle Carlson

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Check swap space

sudo swapon -s

An empty list will confirm that you have no swap files enabled:

Filename Type Size Used Priority

Create and Enable the Swap File (swapfile)

sudo dd if=/dev/zero of=/swapfile bs=1024 count=256k

Create a linux swap area:

sudo mkswap /swapfile

output:

Setting up swapspace version 1, size = 262140 KiB no label, UUID=103c4545-5fc5-47f3-a8b3-dfbdb64fd7eb

Activate the swapfile:

sudo swapon /swapfile

check if you can see the swap summary.

swapon -s

Filename                Type        Size    Used    Priority
/swapfile                               file        262140  0   -1

Done!

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To make the swap file permenant

sudo nano /etc/fstab

Paste in the following line:

/swapfile none swap sw 0 0

Swappiness in the file should be set to 10. Skipping this step may cause both poor performance, whereas setting it to 10 will cause swap to act as an emergency buffer, preventing out-of-memory crashes.

echo 10 | sudo tee /proc/sys/vm/swappiness
echo vm.swappiness = 10 | sudo tee -a /etc/sysctl.conf

set up the correct permissions on the swap file to not readable by the public:

sudo chown root:root /swapfile 
sudo chmod 0600 /swapfile