diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index c4b0e2a328..a9c93ecc3b 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -52,8 +52,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
     - name: check environment
diff --git a/.github/workflows/clang-tidy.yml b/.github/workflows/clang-tidy.yml
index eb12f605b5..19d3bfee31 100644
--- a/.github/workflows/clang-tidy.yml
+++ b/.github/workflows/clang-tidy.yml
@@ -34,8 +34,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/compile_linux.yml b/.github/workflows/compile_linux.yml
index 3ce87d237d..af3b7f8fc1 100644
--- a/.github/workflows/compile_linux.yml
+++ b/.github/workflows/compile_linux.yml
@@ -43,8 +43,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/compile_linux_arm64.yml b/.github/workflows/compile_linux_arm64.yml
index 2f16acffef..68877079c5 100644
--- a/.github/workflows/compile_linux_arm64.yml
+++ b/.github/workflows/compile_linux_arm64.yml
@@ -39,8 +39,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/compile_macos.yml b/.github/workflows/compile_macos.yml
index 1800a12070..83764400f9 100644
--- a/.github/workflows/compile_macos.yml
+++ b/.github/workflows/compile_macos.yml
@@ -43,8 +43,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/compile_nuttx.yml b/.github/workflows/compile_nuttx.yml
index 884cbd257d..3173c56f9c 100644
--- a/.github/workflows/compile_nuttx.yml
+++ b/.github/workflows/compile_nuttx.yml
@@ -100,8 +100,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/compile_nuttx_cannode.yml b/.github/workflows/compile_nuttx_cannode.yml
index cdc14ab4ac..51acadf150 100644
--- a/.github/workflows/compile_nuttx_cannode.yml
+++ b/.github/workflows/compile_nuttx_cannode.yml
@@ -43,8 +43,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/mavros_avoidance_tests.yml b/.github/workflows/mavros_avoidance_tests.yml
index 24dd53629f..24bf94b3f4 100644
--- a/.github/workflows/mavros_avoidance_tests.yml
+++ b/.github/workflows/mavros_avoidance_tests.yml
@@ -43,8 +43,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/mavros_mission_tests.yml b/.github/workflows/mavros_mission_tests.yml
index 6463e17d12..60f158f240 100644
--- a/.github/workflows/mavros_mission_tests.yml
+++ b/.github/workflows/mavros_mission_tests.yml
@@ -49,8 +49,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/mavros_offboard_tests.yml b/.github/workflows/mavros_offboard_tests.yml
index ed3832ca65..ddf5cc3a76 100644
--- a/.github/workflows/mavros_offboard_tests.yml
+++ b/.github/workflows/mavros_offboard_tests.yml
@@ -44,8 +44,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z
 
diff --git a/.github/workflows/sitl_tests.yml b/.github/workflows/sitl_tests.yml
index b54a1961de..11ad4ebea9 100644
--- a/.github/workflows/sitl_tests.yml
+++ b/.github/workflows/sitl_tests.yml
@@ -49,8 +49,8 @@ jobs:
           mkdir -p ~/.ccache
           echo "base_dir = ${GITHUB_WORKSPACE}" > ~/.ccache/ccache.conf
           echo "compression = true" >> ~/.ccache/ccache.conf
-          echo "compression_level = 6" >> ~/.ccache/ccache.conf
-          echo "max_size = 400M" >> ~/.ccache/ccache.conf
+          echo "compression_level = 5" >> ~/.ccache/ccache.conf
+          echo "max_size = 100M" >> ~/.ccache/ccache.conf
           ccache -s
           ccache -z