Struct LiveRuntimeConfig 

pub struct LiveRuntimeConfig {
    pub appendfsync: Option<Fsync>,
    pub auto_aof_rewrite_pct: Option<u32>,
    pub auto_aof_rewrite_bytes: Option<u64>,
    pub auto_aof_rewrite_interval_secs: Option<u64>,
    pub auto_aof_rewrite_min_size: Option<u64>,
    pub tick_interval_ms: Option<u64>,
    pub notify_flags: Option<NotificationFlags>,
    pub slowlog_slower_than_micros: Option<i64>,
    pub slowlog_max_len: Option<u32>,
    pub promotion_epoch: u64,
}

Live snapshot of the runtime-owned knobs that may have been changed since this shard’s last tick. Built by the Commands impl from its own config source (e.g. kevy reads config_global). Each Some(_) is applied to the shard; each None leaves the existing setting alone.

One snapshot is built per tick (every 100 ms by default), so its cost is amortised across thousands of commands.

Fields

appendfsync: Option<Fsync>

AOF fsync policy. Applied via Aof::set_fsync — switching to Always mid-flight also flushes any buffered bytes so the new “every write is on disk before reply” contract is honoured from the next append onward.

auto_aof_rewrite_pct: Option<u32>

auto_aof_rewrite_percentage. 0 disables the auto-trigger.

auto_aof_rewrite_bytes: Option<u64>

Absolute-size auto-rewrite trigger in bytes (0 = rule off).

auto_aof_rewrite_interval_secs: Option<u64>

Time-based auto-rewrite trigger in seconds (0 = rule off).

auto_aof_rewrite_min_size: Option<u64>

auto_aof_rewrite_min_size in bytes.

tick_interval_ms: Option<u64>

New tick interval in ms (1000/hz). 0 disables ticking entirely — note that disabling also turns off active TTL expiry and the auto-rewrite tick path. Lazy expiry on access always still works.

notify_flags: Option<NotificationFlags>

notify_keyspace_events flags. Parsed by the Commands impl from its config source (e.g. kevy reads config_global + kevy_config::parse_notification_flags). Default-empty flags mean OFF — writes pay one bool-OR check and skip every per-key keyspace notification publish.

slowlog_slower_than_micros: Option<i64>

[slowlog].slower_than_micros — -1 disables, 0 records all, >0 is the strict micros threshold. None keeps the existing shard setting (set by the Runtime builder at startup).

slowlog_max_len: Option<u32>

[slowlog].max_len — ring cap per shard. Shrinking trims the oldest entries on the next tick application.

promotion_epoch: u64

Monotonic promotion counter. The command layer bumps it every time this process is PROMOTED (replica → primary: REPLICAOF NO ONE on a following replica, or an election win). Each shard tracks the last value it saw; an increase makes the shard bump its feed generation (offsets restart at 0, persisted via the feed-gen sidecar) — so a REPL.TOKEN minted before the failover can never falsely satisfy a REPL.WAIT against the new primary’s unrelated offset space. Not an Option: 0 (the default) means “never promoted” and embedders pay nothing.

Trait Implementations

impl Clone for LiveRuntimeConfig

fn clone(&self) -> LiveRuntimeConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for LiveRuntimeConfig

impl Debug for LiveRuntimeConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LiveRuntimeConfig

fn default() -> LiveRuntimeConfig

Returns the “default value” for a type.