Enum VictimPolicy 

pub enum VictimPolicy {
    Youngest,
    Oldest,
}

Available on crate feature std only.

How to choose which transaction in a deadlock cycle to abort.

Both policies break the cycle correctly; they differ only in which member pays. Transaction ids are taken as a proxy for age — a larger id is a transaction that started later.

Variants

Youngest

Abort the youngest transaction in the cycle (the largest TxnId).

The default. Aborting the most recently started transaction tends to waste the least already-done work.

Oldest

Abort the oldest transaction in the cycle (the smallest TxnId).

Useful when the oldest transaction is the one most likely to be stuck or holding the most locks.

Trait Implementations

impl Clone for VictimPolicy

fn clone(&self) -> VictimPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for VictimPolicy

impl Debug for VictimPolicy

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

Formats the value using the given formatter.

impl Default for VictimPolicy

fn default() -> VictimPolicy

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for VictimPolicy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for VictimPolicy

impl Hash for VictimPolicy

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for VictimPolicy

fn eq(&self, other: &VictimPolicy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for VictimPolicy

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for VictimPolicy