diff --git a/slingshot/src/firehose_cache.rs b/slingshot/src/firehose_cache.rs
index 1ff33da..29ce666 100644
--- a/slingshot/src/firehose_cache.rs
+++ b/slingshot/src/firehose_cache.rs
@@ -4,15 +4,17 @@ use std::path::Path;
 
 pub async fn firehose_cache(
     cache_dir: impl AsRef<Path>,
+    memory_mb: usize,
+    disk_gb: usize,
 ) -> Result<HybridCache<String, CachedRecord>, String> {
     let cache = HybridCacheBuilder::new()
         .with_name("firehose")
-        .memory(64 * 2_usize.pow(20))
+        .memory(memory_mb * 2_usize.pow(20))
         .with_weighter(|k: &String, v| k.len() + std::mem::size_of_val(v))
         .storage(Engine::large())
         .with_device_options(
             DirectFsDeviceOptions::new(cache_dir)
-                .with_capacity(2_usize.pow(30)) // TODO: configurable (1GB to have something)
+                .with_capacity(disk_gb * 2_usize.pow(30))
                 .with_file_size(16 * 2_usize.pow(20)), // note: this does limit the max cached item size, warning jumbo records
         )
         .build()
diff --git a/slingshot/src/main.rs b/slingshot/src/main.rs
index 6ef8058..07438f2 100644
--- a/slingshot/src/main.rs
+++ b/slingshot/src/main.rs
@@ -31,6 +31,14 @@ struct Args {
     #[arg(long, env = "SLINGSHOT_BIND")]
     #[clap(default_value = "0.0.0.0:8080")]
     bind: std::net::SocketAddr,
+    /// memory cache size in megabytes
+    #[arg(long, env = "SLINGSHOT_CACHE_MEMORY_MB")]
+    #[clap(default_value_t = 64)]
+    cache_memory_mb: usize,
+    /// disk cache size in gigabytes
+    #[arg(long, env = "SLINGHSOT_CACHE_DISK_DB")]
+    #[clap(default_value_t = 1)]
+    cache_disk_gb: usize,
     /// the domain pointing to this server
     ///
     /// if present:
@@ -108,7 +116,12 @@ async fn main() -> Result<(), String> {
     log::info!("cache dir ready at at {cache_dir:?}.");
 
     log::info!("setting up firehose cache...");
-    let cache = firehose_cache(cache_dir.join("./firehose")).await?;
+    let cache = firehose_cache(
+        cache_dir.join("./firehose"),
+        args.cache_memory_mb,
+        args.cache_disk_gb,
+    )
+    .await?;
     log::info!("firehose cache ready.");
 
     let mut tasks: tokio::task::JoinSet<Result<(), MainTaskError>> = tokio::task::JoinSet::new();