lower default max chunk cache size to 512MB

4GB by default is too much. most deployments will keep filling their
cache with chunks that become stale.

Author: Dieterbe

docker/docker-chaos/metrictank.ini

@@ -202,9 +202,9 @@ buffer-size = 20000
 
 ## chunk cache ##
 [chunk-cache]
-# maximum size of chunk cache in bytes. (1024 ^ 3) * 4 = 4294967296 = 4G
+# maximum size of chunk cache in bytes. 512 MB = (1024 ^ 2) * 512 = 536870912
 # 0 disables cache
-max-size = 4294967296
+max-size = 536870912
 
 ## http api ##
 [http]

docker/docker-cluster-query/metrictank.ini

@@ -202,9 +202,9 @@ buffer-size = 20000
 
 ## chunk cache ##
 [chunk-cache]
-# maximum size of chunk cache in bytes. (1024 ^ 3) * 4 = 4294967296 = 4G
+# maximum size of chunk cache in bytes. 512 MB = (1024 ^ 2) * 512 = 536870912
 # 0 disables cache
-max-size = 4294967296
+max-size = 536870912
 
 ## http api ##
 [http]

docker/docker-cluster/metrictank.ini

@@ -202,9 +202,9 @@ buffer-size = 20000
 
 ## chunk cache ##
 [chunk-cache]
-# maximum size of chunk cache in bytes. (1024 ^ 3) * 4 = 4294967296 = 4G
+# maximum size of chunk cache in bytes. 512 MB = (1024 ^ 2) * 512 = 536870912
 # 0 disables cache
-max-size = 4294967296
+max-size = 536870912
 
 ## http api ##
 [http]

docker/docker-dev-custom-cfg-kafka/metrictank.ini

@@ -202,9 +202,9 @@ buffer-size = 20000
 
 ## chunk cache ##
 [chunk-cache]
-# maximum size of chunk cache in bytes. (1024 ^ 3) * 4 = 4294967296 = 4G
+# maximum size of chunk cache in bytes. 512 MB = (1024 ^ 2) * 512 = 536870912
 # 0 disables cache
-max-size = 4294967296
+max-size = 536870912
 
 ## http api ##
 [http]

docs/config.md

@@ -248,9 +248,9 @@ buffer-size = 20000
 
 ```
 [chunk-cache]
-# maximum size of chunk cache in bytes. (1024 ^ 3) * 4 = 4294967296 = 4G
+# maximum size of chunk cache in bytes. 512 MB = (1024 ^ 2) * 512 = 536870912
 # 0 disables cache
-max-size = 4294967296
+max-size = 536870912
 ```
 
 ## http api ##

metrictank-sample.ini

@@ -205,9 +205,9 @@ buffer-size = 20000
 
 ## chunk cache ##
 [chunk-cache]
-# maximum size of chunk cache in bytes. (1024 ^ 3) * 4 = 4294967296 = 4G
+# maximum size of chunk cache in bytes. 512 MB = (1024 ^ 2) * 512 = 536870912
 # 0 disables cache
-max-size = 4294967296
+max-size = 536870912
 
 ## http api ##
 [http]

scripts/config/metrictank-docker.ini

@@ -202,9 +202,9 @@ buffer-size = 20000
 
 ## chunk cache ##
 [chunk-cache]
-# maximum size of chunk cache in bytes. (1024 ^ 3) * 4 = 4294967296 = 4G
+# maximum size of chunk cache in bytes. 512 MB = (1024 ^ 2) * 512 = 536870912
 # 0 disables cache
-max-size = 4294967296
+max-size = 536870912
 
 ## http api ##
 [http]

scripts/config/metrictank-package.ini

@@ -202,9 +202,9 @@ buffer-size = 20000
 
 ## chunk cache ##
 [chunk-cache]
-# maximum size of chunk cache in bytes. (1024 ^ 3) * 4 = 4294967296 = 4G
+# maximum size of chunk cache in bytes. 512 MB = (1024 ^ 2) * 512 = 536870912
 # 0 disables cache
-max-size = 4294967296
+max-size = 536870912
 
 ## http api ##
 [http]