diff --git a/docker/demo/Dockerfile b/docker/demo/Dockerfile
index c72a7e9ca..bf741a876 100644
--- a/docker/demo/Dockerfile
+++ b/docker/demo/Dockerfile
@@ -3,7 +3,7 @@ FROM photoprism/photoprism:preview-ce AS build
 # Set environment variables
 ENV TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PHOTOPRISM_STORAGE_PATH="/photoprism/storage" \
     PHOTOPRISM_DEBUG="false" \
     PHOTOPRISM_READONLY="false" \
diff --git a/docker/demo/debian/Dockerfile b/docker/demo/debian/Dockerfile
index a23774d2c..26aeefc4d 100644
--- a/docker/demo/debian/Dockerfile
+++ b/docker/demo/debian/Dockerfile
@@ -3,7 +3,7 @@ FROM photoprism/photoprism:preview-ce-debian AS build
 # Set environment variables
 ENV TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PHOTOPRISM_STORAGE_PATH="/photoprism/storage" \
     PHOTOPRISM_DEBUG="false" \
     PHOTOPRISM_READONLY="false" \
diff --git a/docker/demo/ubuntu/Dockerfile b/docker/demo/ubuntu/Dockerfile
index 3d676a33b..c9b97a455 100644
--- a/docker/demo/ubuntu/Dockerfile
+++ b/docker/demo/ubuntu/Dockerfile
@@ -3,7 +3,7 @@ FROM photoprism/photoprism:preview-ce-ubuntu AS build
 # Set environment variables
 ENV TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PHOTOPRISM_STORAGE_PATH="/photoprism/storage" \
     PHOTOPRISM_DEBUG="false" \
     PHOTOPRISM_READONLY="false" \
diff --git a/docker/demo/unstable/Dockerfile b/docker/demo/unstable/Dockerfile
index 98fd93973..ef4235213 100644
--- a/docker/demo/unstable/Dockerfile
+++ b/docker/demo/unstable/Dockerfile
@@ -3,7 +3,7 @@ FROM photoprism/photoprism:unstable-ce AS build
 # Set environment variables
 ENV TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PHOTOPRISM_STORAGE_PATH="/photoprism/storage" \
     PHOTOPRISM_DEBUG="false" \
     PHOTOPRISM_READONLY="false" \
diff --git a/docker/develop/armv7/Dockerfile b/docker/develop/armv7/Dockerfile
index 0e081079e..2a0569680 100644
--- a/docker/develop/armv7/Dockerfile
+++ b/docker/develop/armv7/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_VERSION=1.15.2 \
     TF_CPP_MIN_LOG_LEVEL=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/bookworm-slim/Dockerfile b/docker/develop/bookworm-slim/Dockerfile
index d70be86eb..c4d1b6f70 100644
--- a/docker/develop/bookworm-slim/Dockerfile
+++ b/docker/develop/bookworm-slim/Dockerfile
@@ -31,7 +31,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism"
 
 # Copy scripts and package sources config.
diff --git a/docker/develop/bookworm/Dockerfile b/docker/develop/bookworm/Dockerfile
index 83c581110..47d5defba 100644
--- a/docker/develop/bookworm/Dockerfile
+++ b/docker/develop/bookworm/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/bullseye-slim/Dockerfile b/docker/develop/bullseye-slim/Dockerfile
index 6077817ba..8e14ed9ed 100644
--- a/docker/develop/bullseye-slim/Dockerfile
+++ b/docker/develop/bullseye-slim/Dockerfile
@@ -31,7 +31,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism"
 
 # copy scripts and debian backports sources list
diff --git a/docker/develop/bullseye/Dockerfile b/docker/develop/bullseye/Dockerfile
index eacb1a5ab..8868f0ceb 100644
--- a/docker/develop/bullseye/Dockerfile
+++ b/docker/develop/bullseye/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/buster/Dockerfile b/docker/develop/buster/Dockerfile
index 72a96ae2a..f4e25a6cc 100644
--- a/docker/develop/buster/Dockerfile
+++ b/docker/develop/buster/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/impish/Dockerfile b/docker/develop/impish/Dockerfile
index 0b2afe86f..ad3ff8b31 100644
--- a/docker/develop/impish/Dockerfile
+++ b/docker/develop/impish/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/jammy-slim/Dockerfile b/docker/develop/jammy-slim/Dockerfile
index d642f8539..fea506974 100644
--- a/docker/develop/jammy-slim/Dockerfile
+++ b/docker/develop/jammy-slim/Dockerfile
@@ -31,7 +31,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     S6_KEEP_ENV=0 \
     S6_VERBOSITY=0 \
diff --git a/docker/develop/jammy/Dockerfile b/docker/develop/jammy/Dockerfile
index a36be7659..bc9824dcc 100644
--- a/docker/develop/jammy/Dockerfile
+++ b/docker/develop/jammy/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/lunar-slim/Dockerfile b/docker/develop/lunar-slim/Dockerfile
index 802afd364..b91604034 100644
--- a/docker/develop/lunar-slim/Dockerfile
+++ b/docker/develop/lunar-slim/Dockerfile
@@ -31,7 +31,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism"
 
 # Copy scripts and package sources config.
diff --git a/docker/develop/lunar/Dockerfile b/docker/develop/lunar/Dockerfile
index 13d35bee6..cfcfa4719 100644
--- a/docker/develop/lunar/Dockerfile
+++ b/docker/develop/lunar/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/mantic-slim/Dockerfile b/docker/develop/mantic-slim/Dockerfile
index cd698d8b0..8fcc2c57a 100644
--- a/docker/develop/mantic-slim/Dockerfile
+++ b/docker/develop/mantic-slim/Dockerfile
@@ -31,7 +31,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism"
 
 # Copy scripts and package sources config.
diff --git a/docker/develop/mantic/Dockerfile b/docker/develop/mantic/Dockerfile
index a765ca9ce..bf5fa9d9e 100644
--- a/docker/develop/mantic/Dockerfile
+++ b/docker/develop/mantic/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/noble-slim/Dockerfile b/docker/develop/noble-slim/Dockerfile
index bb641f6a2..db436ba5c 100644
--- a/docker/develop/noble-slim/Dockerfile
+++ b/docker/develop/noble-slim/Dockerfile
@@ -31,7 +31,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism"
 
 # Copy scripts and package sources config.
diff --git a/docker/develop/noble/Dockerfile b/docker/develop/noble/Dockerfile
index 1bd54b123..403fdee59 100644
--- a/docker/develop/noble/Dockerfile
+++ b/docker/develop/noble/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/oracular-slim/Dockerfile b/docker/develop/oracular-slim/Dockerfile
index a270604a1..c70122c09 100644
--- a/docker/develop/oracular-slim/Dockerfile
+++ b/docker/develop/oracular-slim/Dockerfile
@@ -31,7 +31,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     S6_KEEP_ENV=0 \
     S6_VERBOSITY=0 \
diff --git a/docker/develop/oracular/Dockerfile b/docker/develop/oracular/Dockerfile
index c8dee7f4b..2e482e49e 100644
--- a/docker/develop/oracular/Dockerfile
+++ b/docker/develop/oracular/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/develop/plucky-slim/Dockerfile b/docker/develop/plucky-slim/Dockerfile
index 3812ccbca..cde3600e3 100644
--- a/docker/develop/plucky-slim/Dockerfile
+++ b/docker/develop/plucky-slim/Dockerfile
@@ -31,7 +31,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     S6_KEEP_ENV=0 \
     S6_VERBOSITY=0 \
diff --git a/docker/develop/plucky/Dockerfile b/docker/develop/plucky/Dockerfile
index 17f5c19d9..cf5b99c54 100644
--- a/docker/develop/plucky/Dockerfile
+++ b/docker/develop/plucky/Dockerfile
@@ -32,7 +32,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     TMPDIR="/tmp" \
     TF_CPP_MIN_LOG_LEVEL=1 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     GOPATH="/go" \
     GOBIN="/usr/local/bin" \
     GO111MODULE="on" \
diff --git a/docker/photoprism/armv7/Dockerfile b/docker/photoprism/armv7/Dockerfile
index 9b4a69d6f..ea3b01d40 100644
--- a/docker/photoprism/armv7/Dockerfile
+++ b/docker/photoprism/armv7/Dockerfile
@@ -48,7 +48,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_VERSION=1.15.2 \
     TF_CPP_MIN_LOG_LEVEL=2 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/bookworm/Dockerfile b/docker/photoprism/bookworm/Dockerfile
index 5b9b3253c..6b00c0e20 100644
--- a/docker/photoprism/bookworm/Dockerfile
+++ b/docker/photoprism/bookworm/Dockerfile
@@ -43,7 +43,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/bullseye/Dockerfile b/docker/photoprism/bullseye/Dockerfile
index 5f421b6b9..be696a4a3 100644
--- a/docker/photoprism/bullseye/Dockerfile
+++ b/docker/photoprism/bullseye/Dockerfile
@@ -43,7 +43,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/buster/Dockerfile b/docker/photoprism/buster/Dockerfile
index 0352c62f8..959563691 100644
--- a/docker/photoprism/buster/Dockerfile
+++ b/docker/photoprism/buster/Dockerfile
@@ -46,7 +46,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/impish/Dockerfile b/docker/photoprism/impish/Dockerfile
index a3b6f0ab5..1b4e3c4d5 100644
--- a/docker/photoprism/impish/Dockerfile
+++ b/docker/photoprism/impish/Dockerfile
@@ -46,7 +46,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/jammy/Dockerfile b/docker/photoprism/jammy/Dockerfile
index ca5b5fcea..94b8a2ad1 100644
--- a/docker/photoprism/jammy/Dockerfile
+++ b/docker/photoprism/jammy/Dockerfile
@@ -44,7 +44,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/lunar/Dockerfile b/docker/photoprism/lunar/Dockerfile
index 6d862c400..5df69a5df 100644
--- a/docker/photoprism/lunar/Dockerfile
+++ b/docker/photoprism/lunar/Dockerfile
@@ -44,7 +44,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/mantic/Dockerfile b/docker/photoprism/mantic/Dockerfile
index e0ba22d20..7264f9ade 100644
--- a/docker/photoprism/mantic/Dockerfile
+++ b/docker/photoprism/mantic/Dockerfile
@@ -44,7 +44,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/noble/Dockerfile b/docker/photoprism/noble/Dockerfile
index d6ade69cc..4246e4f04 100644
--- a/docker/photoprism/noble/Dockerfile
+++ b/docker/photoprism/noble/Dockerfile
@@ -44,7 +44,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/oracular/Dockerfile b/docker/photoprism/oracular/Dockerfile
index 5a55af43c..35cbcc930 100644
--- a/docker/photoprism/oracular/Dockerfile
+++ b/docker/photoprism/oracular/Dockerfile
@@ -44,7 +44,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \
diff --git a/docker/photoprism/plucky/Dockerfile b/docker/photoprism/plucky/Dockerfile
index 9dbcfb315..2c9b5451c 100644
--- a/docker/photoprism/plucky/Dockerfile
+++ b/docker/photoprism/plucky/Dockerfile
@@ -44,7 +44,7 @@ ENV PHOTOPRISM_ARCH=$TARGETARCH \
     DEBIAN_FRONTEND="noninteractive" \
     TF_CPP_MIN_LOG_LEVEL=2 \
     TF_ENABLE_ONEDNN_OPTS=1 \
-    MALLOC_ARENA_MAX=4 \
+    MALLOC_ARENA_MAX=2 \
     PROG="photoprism" \
     PHOTOPRISM_ASSETS_PATH="/opt/photoprism/assets" \
     PHOTOPRISM_IMPORT_PATH="/photoprism/import" \