dont set --cache if not specified, it messes with things

Signed-off-by: Jakub Sokołowski <jakub@status.im>

README.md

@@ -39,4 +39,5 @@ For the rest see the [`defaults/main.yml`](/defaults/main.yml) config file.
 
 # Known Issues
 
-Currently only 3 networks are supported: `mainnet`, `ropsten`, and `goerli`
+* Currently only 3 networks are supported: `mainnet`, `ropsten`, `goerli`, and `yolov1`.
+* Setting `--cache` values higher than 1/3rd of available memory will cause trouble syncing.

defaults/main.yml

@@ -93,10 +93,8 @@ geth_consul_default_tags:
 geth_consul_extra_tags: []
 geth_consul_tags: '{{ geth_consul_default_tags + geth_consul_extra_tags }}'
 
-# resources limits to avoid killing the host
+# Geth cache size. WARNING: Values higher than 1GB cause issues.
-# Geth cache usage limit
+geth_cache_size: ~
-geth_cache_ratio: 0.4
-geth_cache_size: '{{ (((ansible_memtotal_mb * geth_cache_ratio|float) / 1204) | round | int) * 1024 | int }}'
 # Container memory limits
 geth_cont_mem_ratio: 0.6
 geth_cont_mem_limit: '{{ (ansible_memtotal_mb * geth_cont_mem_ratio|float) | int }}'

tasks/container.yml

@@ -42,10 +42,12 @@
       {% if geth_metrics_enabled %}
       --metrics
       {% endif %}
+      {% if geth_cache_size %}
+      --cache={{ geth_cache_size }}
+      {% endif %}
       --nousb
       --extradata={{ geth_extra_data }}
       --verbosity={{ geth_log_level_id }} 
-      --cache={{ geth_cache_size }}
       --maxpeers={{ geth_max_peers }}
       --maxpendpeers="{{ geth_max_pend_peers }}"
       --port={{ geth_port }}