Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
var ( // PlanCacheEnabled stores the global config "plan-cache-enabled". PlanCacheEnabled bool // PlanCacheShards stores the global config "plan-cache-shards". PlanCacheShards int64 // PlanCacheCapacity stores the global config "plan-cache-capacity". PlanCacheCapacity int64 // GlobalPlanCache stores the global plan cache for every session in a tidb-server. GlobalPlanCache *ShardedLRUCache )
Functions ¶
This section is empty.
Types ¶
type Key ¶
type Key interface {
Hash() []byte
}
Key is the interface that every key in LRU Cache should implement.
func NewSQLCacheKey ¶
func NewSQLCacheKey(sessionVars *variable.SessionVars, sql string, schemaVersion int64, readOnly bool) Key
NewSQLCacheKey creates a new sqlCacheKey object.
type SQLCacheValue ¶
SQLCacheValue stores the cached Statement and StmtNode.
func NewSQLCacheValue ¶
NewSQLCacheValue creates a SQLCacheValue.
type ShardedLRUCache ¶
type ShardedLRUCache struct {
// contains filtered or unexported fields
}
ShardedLRUCache is a sharded LRU Cache, thread safe.
func NewShardedLRUCache ¶
func NewShardedLRUCache(capacity, shardCount int64) *ShardedLRUCache
NewShardedLRUCache creates a ShardedLRUCache.
func (*ShardedLRUCache) Get ¶
func (s *ShardedLRUCache) Get(key Key) (Value, bool)
Get gets a value from a ShardedLRUCache.
func (*ShardedLRUCache) Put ¶
func (s *ShardedLRUCache) Put(key Key, value Value)
Put puts a (key, value) pair to a ShardedLRUCache.
type SimpleLRUCache ¶
type SimpleLRUCache struct {
// contains filtered or unexported fields
}
SimpleLRUCache is a simple least recently used cache, not thread-safe, use it carefully.
func NewSimpleLRUCache ¶
func NewSimpleLRUCache(capacity int64) *SimpleLRUCache
NewSimpleLRUCache creates a SimpleLRUCache object, whose capacity is "capacity". NOTE: "capacity" should be a positive value.
func (*SimpleLRUCache) Get ¶
func (l *SimpleLRUCache) Get(key Key) (value Value, ok bool)
Get tries to find the corresponding value according to the given key.
func (*SimpleLRUCache) Put ¶
func (l *SimpleLRUCache) Put(key Key, value Value)
Put puts the (key, value) pair into the LRU Cache.
Source Files