From 16a3257ada2864e8b438fc764e1ddda6ca2bde01 Mon Sep 17 00:00:00 2001
From: Yingwen <realevenyag@gmail.com>
Date: Tue, 24 Oct 2023 19:24:47 +0800
Subject: [PATCH] fix: add serde default to MitoConfig (#2650)

* fix: add serde default to MitoConfig

* docs: update config toml
---
 config/datanode.example.toml | 4 ++++
 src/mito2/src/config.rs      | 1 +
 2 files changed, 5 insertions(+)

diff --git a/config/datanode.example.toml b/config/datanode.example.toml
index d4058f6e3f..8376b76f68 100644
--- a/config/datanode.example.toml
+++ b/config/datanode.example.toml
@@ -101,6 +101,10 @@ auto_flush_interval = "1h"
 global_write_buffer_size = "1GB"
 # Global write buffer size threshold to reject write requests (default 2G).
 global_write_buffer_reject_size = "2GB"
+# Cache size for SST metadata (default 128MB). Setting it to 0 to disable the cache.
+sst_meta_cache_size = "128MB"
+# Cache size for vectors and arrow arrays (default 512MB). Setting it to 0 to disable the cache.
+vector_cache_size = "512MB"
 
 # Log options
 # [logging]
diff --git a/src/mito2/src/config.rs b/src/mito2/src/config.rs
index 7cb8d29679..09b33a886b 100644
--- a/src/mito2/src/config.rs
+++ b/src/mito2/src/config.rs
@@ -28,6 +28,7 @@ const DEFAULT_MAX_BG_JOB: usize = 4;
 
 /// Configuration for [MitoEngine](crate::engine::MitoEngine).
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
+#[serde(default)]
 pub struct MitoConfig {
     // Worker configs:
     /// Number of region workers (default 1).