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Philipp Heckel 2022-11-16 11:27:46 -05:00
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@ -825,19 +825,27 @@ out [this discussion on Reddit](https://www.reddit.com/r/golang/comments/r9u4ee/
Depending on *how you run it*, here are a few limits that are relevant:
### WAL for message cache
### Message cache
By default, the [message cache](#message-cache) (defined by `cache-file`) uses the SQLite default settings, which means it
syncs to disk on every write. For personal servers, this is perfectly adequate. For larger installations, such as ntfy.sh,
the [write-ahead log (WAL)](https://sqlite.org/wal.html) should be enabled, and the sync mode should be adjusted.
See [this article](https://phiresky.github.io/blog/2020/sqlite-performance-tuning/) for details.
In addition to that, for very high load servers (such as ntfy.sh), it may be beneficial to write messages to the cache
in batches, and asynchronously. This can be enabled with the `cache-batch-size` and `cache-batch-timeout`. If you start
seeing `database locked` messages in the logs, you should probably enable that.
Here's how ntfy.sh has been tuned in the `server.yml` file:
``` yaml
cache-batch-size: 25
cache-batch-timeout: "1s"
cache-startup-queries: |
pragma journal_mode = WAL;
pragma synchronous = normal;
pragma temp_store = memory;
pragma busy_timeout = 15000;
vacuum;
```
### For systemd services
@ -990,6 +998,8 @@ variable before running the `ntfy` command (e.g. `export NTFY_LISTEN_HTTP=:80`).
| `cache-file` | `NTFY_CACHE_FILE` | *filename* | - | If set, messages are cached in a local SQLite database instead of only in-memory. This allows for service restarts without losing messages in support of the since= parameter. See [message cache](#message-cache). |
| `cache-duration` | `NTFY_CACHE_DURATION` | *duration* | 12h | Duration for which messages will be buffered before they are deleted. This is required to support the `since=...` and `poll=1` parameter. Set this to `0` to disable the cache entirely. |
| `cache-startup-queries` | `NTFY_CACHE_STARTUP_QUERIES` | *string (SQL queries)* | - | SQL queries to run during database startup; this is useful for tuning and [enabling WAL mode](#wal-for-message-cache) |
| `cache-batch-size` | `NTFY_CACHE_BATCH_SIZE` | *int* | 0 | Max size of messages to batch together when writing to message cache (if zero, writes are synchronous) |
| `cache-batch-timeout` | `NTFY_CACHE_BATCH_TIMEOUT` | *duration* | 0s | Timeout for batched async writes to the message cache (if zero, writes are synchronous) |
| `auth-file` | `NTFY_AUTH_FILE` | *filename* | - | Auth database file used for access control. If set, enables authentication and access control. See [access control](#access-control). |
| `auth-default-access` | `NTFY_AUTH_DEFAULT_ACCESS` | `read-write`, `read-only`, `write-only`, `deny-all` | `read-write` | Default permissions if no matching entries in the auth database are found. Default is `read-write`. |
| `behind-proxy` | `NTFY_BEHIND_PROXY` | *bool* | false | If set, the X-Forwarded-For header is used to determine the visitor IP address instead of the remote address of the connection. |
@ -1054,6 +1064,8 @@ OPTIONS:
--behind-proxy, --behind_proxy, -P if set, use X-Forwarded-For header to determine visitor IP address (for rate limiting) (default: false) [$NTFY_BEHIND_PROXY]
--cache-duration since, --cache_duration since, -b since buffer messages for this time to allow since requests (default: 12h0m0s) [$NTFY_CACHE_DURATION]
--cache-file value, --cache_file value, -C value cache file used for message caching [$NTFY_CACHE_FILE]
--cache-batch-size value, --cache_batch_size value max size of messages to batch together when writing to message cache (if zero, writes are synchronous) (default: 0) [$NTFY_BATCH_SIZE]
--cache-batch-timeout value, --cache_batch_timeout value timeout for batched async writes to the message cache (if zero, writes are synchronous) (default: 0s) [$NTFY_CACHE_BATCH_TIMEOUT]
--cache-startup-queries value, --cache_startup_queries value queries run when the cache database is initialized [$NTFY_CACHE_STARTUP_QUERIES]
--cert-file value, --cert_file value, -E value certificate file, if listen-https is set [$NTFY_CERT_FILE]
--config value, -c value config file (default: /etc/ntfy/server.yml) [$NTFY_CONFIG_FILE]