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docs(README): Document hz flag (#201)

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Document hz flag in readme

The hz flag determines how frequently timers used for key eviction are evaluated. Document this flag in the readme.
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Joseph Bylund 2022-07-12 06:37:36 -04:00 committed by GitHub
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@ -138,9 +138,11 @@ Dragonfly currently supports the following Redis-specific arguments:
In addition, it has Dragonfly specific arguments options:
* `memcache_port` - to enable memcached compatible API on this port. Disabled by default.
* `keys_output_limit` - maximum number of returned keys in `keys` command. Default is 8192.
`keys` is a dangerous command. we truncate its result to avoid blowup in memory when fetching too many keys.
`keys` is a dangerous command. We truncate its result to avoid blowup in memory when fetching too many keys.
* `dbnum` - maximum number of supported databases for `select`.
* `cache_mode` - see [Cache](#novel-cache-design) section below.
* `hz` - key expiry evaluation frequency. Default is 1000. Lower frequency uses less cpu when
idle at the expense of precision in key eviction.
for more options like logs management or tls support, run `dragonfly --help`.