docs: private void adjustCacheSizes() {
          long newSharedCacheSize = voldemortConfig.getBdbCacheSize() - this.reservedCacheSize;
          logger.info("Setting the shared cache size to " + newSharedCacheSize);
          for(Environment environment: unreservedStores) {
              EnvironmentMutableConfig mConfig = environment.getMutableConfig();
              mConfig.setCacheSize(newSharedCacheSize);
              environment.setMutableConfig(mConfig);
          }
      }