search

VladRodionov / bigbase

BigBase - read optimized, fully HBase-compatible, NoSQL Data Store
GNU Affero General Public License v3.0
9 stars 1 forks source link

Block cache: investigate hit ratio for L3 in OffHeapBlopckCachePerfTest #45

Closed VladRodionov closed 10 years ago

VladRodionov commented 10 years ago

It decreases over time. Suspect is in memory L3-RAM reference cache.

VladRodionov commented 10 years ago

several issues:

  1. Not enough memory were allocated to L3-RAM reference cache (it is still 140+ bytes per ref - see #44)
  2. Some logic flaw in processing missing block in L3-DISK when it is present in L3-RAM was found.
  3. It is worth doing bulk removal of all references if L3 file they refer to no longer exist (should open separate JIRA)
VladRodionov commented 10 years ago

Done 1. 2.