Struct CacheConfig 

pub struct CacheConfig {
    pub dir_capacity: Option<u64>,
    pub dir_ttl_secs: Option<u64>,
    pub file_size_capacity: Option<usize>,
    pub proc_ttl_secs: Option<u64>,
    pub channel_capacity: Option<usize>,
    pub subscribe_buf: Option<usize>,
    pub buffer_size: Option<usize>,
}

Cache configuration (optional — missing fields use code defaults).

Priority: CLI args > fsmon.toml > code defaults.

Fields

dir_capacity: Option<u64>

Directory handle cache capacity (default: 100,000). Each entry ≈ 150-200 bytes. Lower this on memory-constrained systems, raise it when monitoring large directory trees (>100k dirs).

dir_ttl_secs: Option<u64>

Directory handle cache TTL in seconds (default: 3600). Shorter TTL frees memory faster for volatile directory structures, longer TTL reduces handle re-resolution for stable directories.

file_size_capacity: Option<usize>

File size cache capacity (default: 10,000). Each entry ≈ 80-120 bytes. Raise for high-file-volume workloads.

proc_ttl_secs: Option<u64>

Process cache TTL in seconds (default: 600). Applies to both proc_cache and pid_tree. Shorter TTL cleans up zombie process entries faster; longer TTL reduces /proc reads.

channel_capacity: Option<usize>

Event channel capacity between reader tasks and the main loop. Default: unbounded. Set to a finite number (e.g. 1024) to cap memory under extreme event storms — reader tasks block when the buffer is full, with fanotify overflow as final backstop.

subscribe_buf: Option<usize>

Subscribe event stream buffer capacity. Number of events the broadcast channel can buffer before dropping oldest for slow subscribers. Default: 4096. Raise for high-throughput workloads with many subscribers.

buffer_size: Option<usize>

Fanotify read buffer size in bytes (default: 32768). Raise for high-throughput event volumes.

Implementations

impl CacheConfig

pub fn resolve_with_cli(&self, cli: &CliCacheOverride) -> ResolvedCacheConfig

Merge: explicit values from this config override defaults, then CLI overrides override config values.

Trait Implementations

impl Clone for CacheConfig

fn clone(&self) -> CacheConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CacheConfig

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CacheConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CacheConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.