Henrik, I used the memory cache only configuration without disk store So : cache_dir null /tmp On start up : Using 8192 Store buckets .. Is there any other information needed in order to analyze such problem ? Thanks , -Arkin On Sun, Jun 15, 2008 at 11:05 AM, Henrik Nordstrom <henrik@xxxxxxxxxxxxxxxxxxx> wrote: > On sön, 2008-06-15 at 10:57 +0800, Arkin Y wrote: > >> Acctually , I tried to use Linux OS default malloc, gnu malloc , dlmalloc, >> dlmalloc could help me get the best performance among the three different >> malloc . > > Interesting. > > For me dlmalloc fails completely when the process size goes above 2GB. > >> I checked all my mgr:info log , when I set the cache_mem to different size , >> the stroe entries are different too . >> When the cache memory is 4GB , the Store Entries are ~519396 >> When the cache memory is 6 GB , the StoreEntries are ~776836 >> When the cache memory is 8 GB , the StoreEntries are ~1026097 > > Are you running without an on-disk store? (cache_dir) > >> The average size of the stored objects almost ~8KB, so I am not sure >> whether such problem was caused by large objects . > > Ok. > > >> I checked a hash_lookup method , If in the worst cases in 8G scenario,it >> looks like almost 2 times of hash keys will be traversed to get the >> storeEntry than in 4 G scenario. > > The size of the hash table is dependent on the store size. > > But I guess this calculation screws up if there is no on-disk cache of > reasonable size. > > On startup, what is reported NN for "Using NN Store buckets" in > cache.log? > > Regards > Henrik >
