diff options
Diffstat (limited to 'src/object.c')
| -rw-r--r-- | src/object.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/object.c b/src/object.c index a77f2aeda..89166582b 100644 --- a/src/object.c +++ b/src/object.c @@ -1166,6 +1166,32 @@ sds getMemoryDoctorReport(void) { return s; } +/* Set the object LRU/LFU depending on server.maxmemory_policy. + * The lfu_freq arg is only relevant if policy is MAXMEMORY_FLAG_LFU. + * The lru_idle and lru_clock args are only relevant if policy + * is MAXMEMORY_FLAG_LRU. + * Either or both of them may be <0, in that case, nothing is set. */ +void objectSetLRUOrLFU(robj *val, long long lfu_freq, long long lru_idle, + long long lru_clock) { + if (server.maxmemory_policy & MAXMEMORY_FLAG_LFU) { + if (lfu_freq >= 0) { + serverAssert(lfu_freq <= 255); + val->lru = (LFUGetTimeInMinutes()<<8) | lfu_freq; + } + } else if (lru_idle >= 0) { + /* Serialized LRU idle time is in seconds. Scale + * according to the LRU clock resolution this Redis + * instance was compiled with (normally 1000 ms, so the + * below statement will expand to lru_idle*1000/1000. */ + lru_idle = lru_idle*1000/LRU_CLOCK_RESOLUTION; + val->lru = lru_clock - lru_idle; + /* If the lru field overflows (since LRU it is a wrapping + * clock), the best we can do is to provide the maximum + * representable idle time. */ + if (val->lru < 0) val->lru = lru_clock+1; + } +} + /* ======================= The OBJECT and MEMORY commands =================== */ /* This is a helper function for the OBJECT command. We need to lookup keys |