From a59f437ee39432e9c056523e07404efcc961d1fa Mon Sep 17 00:00:00 2001
From: Tamo <tamo@meilisearch.com>
Date: Mon, 28 Jun 2021 14:35:50 +0200
Subject: [PATCH] use only half of the computer threads for the indexation by
 default

---
 Cargo.lock                                   | 1 +
 meilisearch-http/Cargo.toml                  | 1 +
 meilisearch-http/src/index/update_handler.rs | 2 +-
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/Cargo.lock b/Cargo.lock
index 1eee0fe65..de2ffc0dc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1631,6 +1631,7 @@ dependencies = [
  "milli",
  "mime",
  "mockall",
+ "num_cpus",
  "obkv",
  "once_cell",
  "oxidized-json-checker",
diff --git a/meilisearch-http/Cargo.toml b/meilisearch-http/Cargo.toml
index 5d2fdbcad..353401382 100644
--- a/meilisearch-http/Cargo.toml
+++ b/meilisearch-http/Cargo.toml
@@ -53,6 +53,7 @@ meilisearch-tokenizer = { git = "https://github.com/meilisearch/tokenizer.git",
 memmap = "0.7.0"
 milli = { git = "https://github.com/meilisearch/milli.git", tag = "v0.6.0" }
 mime = "0.3.16"
+num_cpus = "1.13.0"
 once_cell = "1.5.2"
 oxidized-json-checker = "0.3.2"
 parking_lot = "0.11.1"
diff --git a/meilisearch-http/src/index/update_handler.rs b/meilisearch-http/src/index/update_handler.rs
index 9896c9391..4d860ed7e 100644
--- a/meilisearch-http/src/index/update_handler.rs
+++ b/meilisearch-http/src/index/update_handler.rs
@@ -23,7 +23,7 @@ pub struct UpdateHandler {
 impl UpdateHandler {
     pub fn new(opt: &IndexerOpts) -> anyhow::Result<Self> {
         let thread_pool = rayon::ThreadPoolBuilder::new()
-            .num_threads(opt.indexing_jobs.unwrap_or(0))
+            .num_threads(opt.indexing_jobs.unwrap_or(num_cpus::get() / 2))
             .build()?;
         Ok(Self {
             max_nb_chunks: opt.max_nb_chunks,