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Server Optimization

Tutorial: How to Fix Memory Leak in XUI.One

Maximize your VOD performance and stop random crashes with these essential server tweaks.


The "Full Warehouse" Problem

Imagine your server is a warehouse. XUI.One brings new boxes (video data) in, but if the OS isn't configured correctly, it forgets to take the old boxes out. Eventually, the warehouse fills up (RAM hits 100%), and everything stops.

This is especially common with VOD servers because they handle large files. Let's configure Ubuntu to handle this traffic correctly.

1Step 1: Database & Monitor Check

First, ensure your panel's internal housekeeping is running. If these background tasks fail, temporary data piles up.

  • Verify Cronjobs: Check that pid_monitor is running. This ensures services restart if they hang.
  • Clean Streams Table: Use your panel's maintenance tools to clear the streams_sys table (or equivalent logs in XUI). This is often the hidden culprit of "ghost" memory usage.

2Step 2: Expand Open File Limits (ulimit)

XUI.One is high-performance software, but Ubuntu restricts it by default. Standard limits (1024 open files) act like a tiny door for a huge crowd. We need to widen that door.

Check your current limit:

ulimit -u

If it is low, we need to edit the security limits file:

nano /etc/security/limits.conf

Add these lines to the bottom to allow more simultaneous processes:

# Increase limits for high-performance streaming * hard nofile 500000 * soft nofile 500000 root hard nofile 500000 root soft nofile 500000 * soft nproc 500000 * hard nproc 500000 root soft nproc 500000 root hard nproc 500000

Press CTRL+X, then Y, then Enter to save.

3Step 3: Tune the Kernel (sysctl)

This is the most critical step for fixing memory leaks. We need to tell the OS how to handle network buffers and file system capability so it releases memory faster.

Open the system control configuration:

nano /etc/sysctl.conf

Paste these optimization settings at the end of the file:

# Optimized Kernel Settings for IPTV/VOD net.core.somaxconn = 6815744 net.ipv4.route.flush=1 net.ipv4.tcp_no_metrics_save=1 net.ipv4.tcp_moderate_rcvbuf = 1 fs.file-max = 6815744 fs.aio-max-nr = 6815744 fs.nr_open = 6815744 net.ipv4.ip_local_port_range = 1024 65000 net.ipv4.tcp_sack = 1 net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_rmem = 10000000 10000000 10000000 net.ipv4.tcp_wmem = 10000000 10000000 10000000 net.ipv4.tcp_mem = 10000000 10000000 10000000 net.core.rmem_max = 524287 net.core.wmem_max = 524287 net.core.rmem_default = 524287 net.core.wmem_default = 524287 net.core.optmem_max = 524287 net.core.netdev_max_backlog = 300000 net.ipv4.tcp_max_syn_backlog = 300000 net.netfilter.nf_conntrack_max=1215196608 net.ipv4.tcp_window_scaling = 1 vm.max_map_count = 655300 net.ipv4.tcp_max_tw_buckets = 1440000

Save the file. To apply these settings without restarting, run:

sudo sysctl -p

4Step 4: Reboot & Confirm

Reboot your server to ensure all system-level changes are locked in. After the reboot, verify the new limits:

ulimit -u # Verification: Should display 500000

Your XUI.One server is now tuned for heavy loads and should manage RAM significantly better.

Is Optimization Enough?

These fixes optimize the operating system, but they cannot fix the underlying code of the panel itself. If you find yourself constantly tweaking settings just to keep your server alive, the issue might be the software architecture.

There is a better way. The Xtream-Masters OTT Panel was built with a specific focus on Resource Efficiency. It naturally uses 60% less RAM than competitors, meaning you don't need to fight memory leaks—they just don't happen.

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