Merge pull request #445 from jmazanec15/patch-2

Fix default circuit breaker limit for knn

Author: aetter

docs/knn/settings.md

@@ -31,6 +31,6 @@ Setting | Default | Description
 `knn.cache.item.expiry.minutes` | 3h | If enabled, the idle time before removing a graph from memory.
 `knn.circuit_breaker.unset.percentage` | 75.0 | The native memory usage threshold for the circuit breaker. Memory usage must be below this percentage of `knn.memory.circuit_breaker.limit` for `knn.circuit_breaker.triggered` to remain false.
 `knn.circuit_breaker.triggered` | false | True when memory usage exceeds the `knn.circuit_breaker.unset.percentage` value.
-`knn.memory.circuit_breaker.limit` | 60% | The native memory limit for graphs. At the default value, if a machine has 100 GB of memory and the JVM uses 32 GB, KNN uses 60% of the remaining 68 GB (40.8 GB). If memory usage exceeds this value, KNN removes the least recently used graphs.
+`knn.memory.circuit_breaker.limit` | 50% | The native memory limit for graphs. At the default value, if a machine has 100 GB of memory and the JVM uses 32 GB, the k-NN plugin uses 50% of the remaining 68 GB (34 GB). If memory usage exceeds this value, KNN removes the least recently used graphs.
 `knn.memory.circuit_breaker.enabled` | true | Whether to enable the KNN memory circuit breaker.
 `knn.plugin.enabled`| true | Enables or disables the KNN plugin.