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Improve eviction policy design for dash table

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This commit is contained in:
Roman Gershman 2022-03-13 22:52:21 +02:00
parent cceb0d90ca
commit 4fcb74930e
8 changed files with 201 additions and 58 deletions
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6
src/server/db_slice.h
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@ -96,11 +96,14 @@ class DbSlice {
expire_base_[generation & 1] = now;
}
void SetMaxMemory(size_t max_memory) {
max_memory_ = max_memory;
}
uint64_t expire_base() const {
return expire_base_[0];
}
// returns wall clock in millis as it has been set via UpdateExpireClock.
uint64_t Now() const {
return now_ms_;
@ -224,6 +227,7 @@ class DbSlice {
uint64_t expire_base_[2]; // Used for expire logic, represents a real clock.
uint64_t version_ = 1; // Used to version entries in the PrimeTable.
uint64_t max_memory_ = -1;
mutable SliceEvents events_; // we may change this even for const operations.
using LockTable = absl::flat_hash_map<std::string, IntentLock>;