Allow in-memory cache size to be configured.

Author: Jiri Malek

internal/config/config.go

@@ -108,6 +108,7 @@ type Database struct {
 // Cache represents the cache sub-system configuration.
 type Cache struct {
 	Eviction time.Duration `mapstructure:"eviction"`
+	MaxSize  int           `mapstructure:"size"`
 }
 
 // Compiler represents the contract compilers configuration.

internal/config/default.go

@@ -53,6 +53,9 @@ const (
 	// defCacheEvictionTime holds default time for in-memory eviction periods
 	defCacheEvictionTime = 15 * time.Minute
 
+	// defCacheMax size represents the default max size of the cache in MB
+	defCacheMaxSize = 4096
+
 	// defSolCompilerPath represents the default SOL compiler path
 	defSolCompilerPath = "/usr/bin/solc"
 
@@ -108,13 +111,16 @@ func applyDefaults(cfg *viper.Viper) {
 	cfg.SetDefault(keyLachesisUrl, defLachesisUrl)
 	cfg.SetDefault(keyMongoUrl, defMongoUrl)
 	cfg.SetDefault(keyMongoDatabase, defMongoDatabase)
-	cfg.SetDefault(keyCacheEvictionTime, defCacheEvictionTime)
 	cfg.SetDefault(keySolCompilerPath, defSolCompilerPath)
 	cfg.SetDefault(keyApiPeers, defApiPeers)
 	cfg.SetDefault(keyApiStateOrigin, defApiStateOrigin)
 	cfg.SetDefault(keyErc20TokenMapFilePath, defTokenLogoFilePath)
 	cfg.SetDefault(keyErc20Logos, defERC20Logo)
 
+	// in-memory cache
+	cfg.SetDefault(keyCacheEvictionTime, defCacheEvictionTime)
+	cfg.SetDefault(keyCacheMaxSize, defCacheMaxSize)
+
 	// server timeouts
 	cfg.SetDefault(keyTimeoutRead, defReadTimeout)
 	cfg.SetDefault(keyTimeoutWrite, defWriteTimeout)

internal/config/keys.go

@@ -44,6 +44,7 @@ const (
 
 	// cache related options
 	keyCacheEvictionTime = "cache.eviction"
+	keyCacheMaxSize      = "cache.size"
 
 	// contract validation related
 	keySolCompilerPath = "compiler.sol"

internal/repository/cache/bridge.go

@@ -77,7 +77,7 @@ func cacheConfig(cfg *config.Config, log logger.Logger) bigcache.Config {
 		// cache will not allocate more memory than this limit, value in MB
 		// if value is reached then the oldest entries can be overridden for the new ones
 		// 0 value means no size limit
-		HardMaxCacheSize: 2048,
+		HardMaxCacheSize: cfg.Cache.MaxSize,
 
 		// callback fired when the oldest entry is removed because of its expiration time or no space left
 		// for the new entry, or because delete was called. A bitmask representing the reason will be returned.