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Expand system tuning docs

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Trent Nelson 2020-08-17 22:41:26 -06:00 committed by mergify[bot]
parent 11951eb009
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docs/src/running-validator/validator-start.md
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@ -46,10 +46,14 @@ that CUDA is enabled: `"[<timestamp> solana::validator] CUDA is enabled"`
## System Tuning
For Linux validators, the solana repo includes a daemon to adjust system settings to optimize
performance (namely by increasing the OS UDP buffer limits, and scheduling PoH with realtime policy).
### Linux
#### Automatic
The solana repo includes a daemon to adjust system settings to optimize performance
(namely by increasing the OS UDP buffer limits, and scheduling PoH with realtime policy).
The daemon (`solana-sys-tuner`) is included in the solana binary release.
The daemon (`solana-sys-tuner`) is included in the solana binary release. Restart
it, *before* restarting your validator, after each software upgrade to ensure that
the latest recommended settings are applied.
To run it:
@ -57,6 +61,53 @@ To run it:
sudo solana-sys-tuner --user $(whoami) > sys-tuner.log 2>&1 &
```
#### Manual
If you would prefer to manage system settings on your own, you may do so with
the following commands.
##### **Increase UDP buffers**
```bash
sudo bash -c "cat >/etc/sysctl.d/20-solana-udp-buffers.conf <<EOF
# Increase UDP buffer size
net.core.rmem_default = 134217728
net.core.rmem_max = 134217728
net.core.wmem_default = 134217728
net.core.wmem_max = 134217728
EOF"
```
```bash
sudo sysctl -p /etc/sysctl.d/20-solana-udp-buffers.conf
```
##### **Increased memory mapped files limit**
```bash
sudo bash -c "cat >/etc/sysctl.d/20-solana-mmaps.conf <<EOF
# Increase memory mapped files limit
vm.max_map_count = 500000
EOF"
```
```bash
sudo sysctl -p /etc/sysctl.d/20-solana-mmaps.conf
```
Add
```
LimitNOFILE=500000
```
to the `[Service]` section of your systemd service file, if you use one,
otherwise add it to `/etc/systemd/system.conf`.
```bash
sudo systemctl daemon-reload
```
```bash
sudo bash -c "cat >/etc/security/limits.d/90-solana-nofiles.conf <<EOF
# Increase process file descriptor count limit
* - nofile 500000
EOF"
```
```bash
### Close all open sessions (log out then, in again) ###
```
## Generate identity
Create an identity keypair for your validator by running: