example.env

# =============================================================================
# OxiCloud Environment Configuration
# =============================================================================
# Copy this file to .env and modify as needed for your deployment.
#   cp example.env .env
#
# All variables have sensible defaults. Only override what you need.
# =============================================================================

# -----------------------------------------------------------------------------
# SERVER CONFIGURATION
# -----------------------------------------------------------------------------

# Root directory for file storage (default: ./storage)
OXICLOUD_STORAGE_PATH=./storage

# Path to static files directory (default: ./static)
OXICLOUD_STATIC_PATH=./static

# Server port (default: 8086)
OXICLOUD_SERVER_PORT=8086

# Server bind address (default: 127.0.0.1)
# Use 0.0.0.0 to bind to all interfaces in Docker
# IPv6 format allowed, either ::1 or [::1]
OXICLOUD_SERVER_HOST=127.0.0.1

# Public base URL for generating share links and external URLs
# If not set, defaults to http://{OXICLOUD_SERVER_HOST}:{OXICLOUD_SERVER_PORT}
# Authentication fails if this is not set and you access the host remotely via a domain
# Example: https://cloud.example.com
#OXICLOUD_BASE_URL=https://cloud.example.com

# ── Upload size caps ──────────────────────────────────────────────────
# See docs/config/storage-fine-tuning.md for sizing guidance.

# Whole-file size ceiling. Applies to BOTH direct PUTs (per-request body)
# and chunked uploads (declared `total_size` at session creation — checked
# upfront so oversized requests never accumulate chunks on disk).
# Default: 10 GB on 64-bit, 1 GB on 32-bit.
#OXICLOUD_MAX_UPLOAD_SIZE=10737418240

# Per-request cap for non-chunked PUT bodies (`POST /api/files/upload`,
# `PUT /webdav/...`, `PUT /remote.php/dav/files/...`). Set below
# MAX_UPLOAD_SIZE so files larger than this are pushed onto the chunked
# protocol (resumable on failure, bounded per-request by CHUNK_MAX_BYTES).
# Default: 1 GiB.
#OXICLOUD_DIRECT_PUT_MAX_BYTES=1073741824

# Per-chunk cap for a single chunked-upload PUT (PATCH /api/uploads/{id}
# or PUT /dav/uploads/.../chunk). NC desktop and the OxiCloud frontend
# split large files into chunks of this size or smaller, so this knob
# tightly bounds the worst-case per-request memory/disk footprint
# independently of the whole-file cap. Default: 100 MB.
#OXICLOUD_CHUNK_MAX_BYTES=104857600

# ── Upload spool directories ─────────────────────────────────────────
# Where in-flight uploads land BEFORE being promoted into final blob
# storage. Same-filesystem placement (with `.blobs/`) makes the
# promotion an atomic rename(2); NVMe placement speeds up intake.
# See docs/config/storage-fine-tuning.md for layout examples.

# Directory for non-chunked PUT spool tempfiles. Default: OS temp dir
# ($TMPDIR / /tmp), often tmpfs (RAM) in containers — writing a large
# upload there fills page-cache that counts against the cgroup memory
# limit and can OOMKill the process. Point this at a real-disk path
# (same FS as the storage backend is ideal).
#OXICLOUD_UPLOAD_TMPDIR=/var/lib/oxicloud/tmp

# Root directory for chunked-upload sessions (REST + NextCloud chunked
# share this root). Default: {STORAGE_PATH}/.uploads. Pointing this at
# NVMe accelerates the chunk-write + assembly loop; pointing it at the
# same FS as `.blobs/` makes blob promotion atomic.
#OXICLOUD_CHUNK_DIR=/var/lib/oxicloud/.uploads

# How often (seconds) the background sweep reconciles each user's cached
# storage usage with the real sum of their files (default: 600 = 10 min).
# GET /api/auth/me serves the cached value instead of recomputing per request;
# this sweep keeps it fresh for deletes/trash too. Lower = fresher quota,
# higher = less background DB work. Minimum enforced: 30s.
#OXICLOUD_STORAGE_USAGE_RECONCILE_SECS=600

# Allow multiple processes to bind to the same port (SO_REUSEPORT).
# DISABLED by default — leaving this off means a second accidental instance
# will fail immediately with "address already in use", which is the safe behaviour.
# Enable ONLY when you deliberately run several worker processes in parallel
# (e.g. behind a process supervisor or during a zero-downtime rolling restart).
# Not supported on Windows.
#OXICLOUD_REUSE_PORT=false

# -----------------------------------------------------------------------------
# DATABASE CONFIGURATION
# -----------------------------------------------------------------------------

# PostgreSQL connection string
# Format: postgres://USER:PASSWORD@HOST:PORT/DATABASE
# For Docker: use 'postgres' as the hostname (the docker-compose service name)
# For local development: use 'localhost:5432'
OXICLOUD_DB_CONNECTION_STRING=postgres://postgres:postgres@postgres/oxicloud

# Maximum number of database connections in the pool (default: 20)
#OXICLOUD_DB_MAX_CONNECTIONS=20

# Minimum number of database connections to maintain (default: 5)
#OXICLOUD_DB_MIN_CONNECTIONS=5

# Maximum connections for the maintenance pool (background/batch tasks).
# This pool is isolated from user requests, preventing background operations
# from starving interactive traffic. Default: 5
#OXICLOUD_DB_MAINTENANCE_MAX_CONNECTIONS=5

# Minimum connections for the maintenance pool. Default: 1
#OXICLOUD_DB_MAINTENANCE_MIN_CONNECTIONS=1

# Build-time database URL for SQLx compile-time checks
# Only needed during compilation, not at runtime
DATABASE_URL=postgres://postgres:postgres@localhost:5432/oxicloud

# -----------------------------------------------------------------------------
# AUTHENTICATION CONFIGURATION
# -----------------------------------------------------------------------------

# JWT secret key for signing authentication tokens
# If not set, a secure secret is auto-generated and persisted to
# <STORAGE_PATH>/.jwt_secret so tokens survive container restarts.
# You only need to set this if you want to share the same secret
# across multiple OxiCloud instances or control it externally.
# Generate a custom secret with: openssl rand -hex 32
#OXICLOUD_JWT_SECRET=

# Access token lifetime in seconds (default: 3600 = 1 hour)
#OXICLOUD_ACCESS_TOKEN_EXPIRY_SECS=3600

# Refresh token lifetime in seconds (default: 604800 = 7 days)
# Active sessions auto-renew on use via token rotation, so users stay logged in
# as long as they interact within this window.
#OXICLOUD_REFRESH_TOKEN_EXPIRY_SECS=604800

# Argon2id password hashing parameters
# Increase memory cost for stronger hashing at the expense of login latency.
# Memory cost is in KiB (default: 65536 = 64 MiB)
#OXICLOUD_HASH_MEMORY_COST=65536
# Number of iterations (default: 3)
#OXICLOUD_HASH_TIME_COST=3
# Parallelism lanes (default: 2)
#OXICLOUD_HASH_PARALLELISM=2

# -----------------------------------------------------------------------------
# RATE LIMITING & ACCOUNT LOCKOUT
# -----------------------------------------------------------------------------

# Max login attempts per IP before rate-limiting kicks in (default: 10)
#OXICLOUD_RATE_LIMIT_LOGIN_MAX=10
# Rate-limit window for logins in seconds (default: 60)
#OXICLOUD_RATE_LIMIT_LOGIN_WINDOW_SECS=60

# Max registration attempts per IP per window (default: 5)
#OXICLOUD_RATE_LIMIT_REGISTER_MAX=5
# Rate-limit window for registrations in seconds (default: 3600)
#OXICLOUD_RATE_LIMIT_REGISTER_WINDOW_SECS=3600

# Max token refresh attempts per IP per window (default: 20)
#OXICLOUD_RATE_LIMIT_REFRESH_MAX=20
# Rate-limit window for token refresh in seconds (default: 60)
#OXICLOUD_RATE_LIMIT_REFRESH_WINDOW_SECS=60

# Consecutive failed logins before account lockout (default: 5)
#OXICLOUD_LOCKOUT_MAX_FAILURES=5
# Account lockout duration in seconds (default: 900 = 15 minutes)
#OXICLOUD_LOCKOUT_DURATION_SECS=900

# -----------------------------------------------------------------------------
# FEATURE FLAGS
# -----------------------------------------------------------------------------

# Enable/disable authentication system (default: true)
#OXICLOUD_ENABLE_AUTH=true

# Enable per-user storage quotas (default: false)
#OXICLOUD_ENABLE_USER_STORAGE_QUOTAS=false

# Enable file/folder sharing (default: true)
#OXICLOUD_ENABLE_FILE_SHARING=true

# Enable trash/recycle bin functionality (default: true)
#OXICLOUD_ENABLE_TRASH=true

# Enable search functionality (default: true)
#OXICLOUD_ENABLE_SEARCH=true

# Enable music playlists and audio metadata (default: true)
#OXICLOUD_ENABLE_MUSIC=true

# Expose other OxiCloud users as a read-only "system" address book
# at GET /api/address-books (default: true)
# Set to false to prevent users from browsing the user directory.
#OXICLOUD_EXPOSE_SYSTEM_USERS=true

# -----------------------------------------------------------------------------
# STORAGE BACKEND
# -----------------------------------------------------------------------------

# Blob storage backend: local (default), s3, or azure
#OXICLOUD_STORAGE_BACKEND=local

# --- S3-Compatible (AWS S3, Backblaze B2, Cloudflare R2, MinIO) ---
# Used when OXICLOUD_STORAGE_BACKEND=s3

# S3 bucket name (required)
#OXICLOUD_S3_BUCKET=my-oxicloud-bucket

# AWS region (default: us-east-1)
#OXICLOUD_S3_REGION=us-east-1

# Access credentials
#OXICLOUD_S3_ACCESS_KEY=
#OXICLOUD_S3_SECRET_KEY=

# Custom endpoint for non-AWS providers (e.g. MinIO, R2, B2)
#OXICLOUD_S3_ENDPOINT_URL=https://s3.example.com

# Force path-style URLs — required for MinIO, Cloudflare R2 (default: false)
#OXICLOUD_S3_FORCE_PATH_STYLE=false

# --- Azure Blob Storage ---
# Used when OXICLOUD_STORAGE_BACKEND=azure

# Storage account name (required)
#OXICLOUD_AZURE_ACCOUNT_NAME=
# Storage account key (or use SAS token below)
#OXICLOUD_AZURE_ACCOUNT_KEY=
# Blob container name (required)
#OXICLOUD_AZURE_CONTAINER=oxicloud
# SAS token (alternative to account key)
#OXICLOUD_AZURE_SAS_TOKEN=

# --- Local Disk Cache for Remote Backends ---
# LRU cache that speeds up repeated reads from S3 or Azure.

# Enable disk cache (default: false)
#OXICLOUD_STORAGE_CACHE_ENABLED=false
# Maximum cache size in bytes (default: 53687091200 = 50 GB)
#OXICLOUD_STORAGE_CACHE_MAX_SIZE=53687091200
# Cache directory (default: {STORAGE_PATH}/.blob-cache)
#OXICLOUD_STORAGE_CACHE_PATH=

# --- Client-Side Encryption ---
# AES-256-GCM encryption applied to blobs before writing to any backend.
# WARNING: losing the key means losing all data. Back it up securely.

# Enable at-rest blob encryption (default: false)
#OXICLOUD_STORAGE_ENCRYPTION_ENABLED=false
# Base64-encoded 32-byte key; generate with: openssl rand -base64 32
#OXICLOUD_STORAGE_ENCRYPTION_KEY=

# --- Retry Policy (Remote Backends) ---
# Exponential backoff retries for transient errors on S3 and Azure.

# Enable retry (default: true)
#OXICLOUD_STORAGE_RETRY_ENABLED=true
# Maximum number of retry attempts (default: 3)
#OXICLOUD_STORAGE_RETRY_MAX_RETRIES=3
# Initial backoff in milliseconds (default: 100)
#OXICLOUD_STORAGE_RETRY_INITIAL_BACKOFF_MS=100
# Maximum backoff cap in milliseconds (default: 10000)
#OXICLOUD_STORAGE_RETRY_MAX_BACKOFF_MS=10000
# Backoff multiplier per retry (default: 2.0)
#OXICLOUD_STORAGE_RETRY_BACKOFF_MULTIPLIER=2.0

# -----------------------------------------------------------------------------
# OPENID CONNECT (OIDC) / SSO CONFIGURATION
# -----------------------------------------------------------------------------

# Enable OIDC authentication (default: false)
OXICLOUD_OIDC_ENABLED=false

# OIDC provider issuer URL (required if OIDC enabled)
# Example: https://auth.example.com/application/o/oxicloud/
#OXICLOUD_OIDC_ISSUER_URL=

# OIDC client ID (required if OIDC enabled)
#OXICLOUD_OIDC_CLIENT_ID=

# OIDC client secret (required if OIDC enabled)
#OXICLOUD_OIDC_CLIENT_SECRET=

# Callback URL after OIDC authentication (must match IdP config)
# Default: http://localhost:8086/api/auth/oidc/callback
#OXICLOUD_OIDC_REDIRECT_URI=http://localhost:8086/api/auth/oidc/callback

# OIDC scopes to request (default: openid profile email)
#OXICLOUD_OIDC_SCOPES=openid profile email

# Frontend URL to redirect after successful OIDC login
# Default: http://localhost:8086
#OXICLOUD_OIDC_FRONTEND_URL=http://localhost:8086

# Auto-create users on first OIDC login (JIT provisioning) (default: true)
#OXICLOUD_OIDC_AUTO_PROVISION=true

# Comma-separated list of OIDC groups that grant admin role
# Example: admins,cloud-admins
#OXICLOUD_OIDC_ADMIN_GROUPS=

# Disable password-based login entirely when OIDC is active (default: false)
#OXICLOUD_OIDC_DISABLE_PASSWORD_LOGIN=false

# Display name for the OIDC provider shown in UI (default: SSO)
#OXICLOUD_OIDC_PROVIDER_NAME=SSO

# -----------------------------------------------------------------------------
# WOPI (WEB APPLICATION OPEN PLATFORM INTERFACE) CONFIGURATION
# -----------------------------------------------------------------------------

# Enable WOPI integration for office document editing (default: false)
# Used with Collabora, OnlyOffice, or other WOPI-compatible editors
OXICLOUD_WOPI_ENABLED=false

# URL to the WOPI client's discovery endpoint
# Example for Collabora: http://collabora:9980/hosting/discovery
# Example for OnlyOffice: http://onlyoffice/hosting/discovery
#OXICLOUD_WOPI_DISCOVERY_URL=

# Public OxiCloud URL used by the browser for the WOPI host page.
# Keep this on the OxiCloud hostname, even when OnlyOffice/Collabora runs elsewhere.
# Example: https://cloud.example.com
#OXICLOUD_WOPI_PUBLIC_BASE_URL=

# Optional callback URL the editor uses to reach OxiCloud's /wopi/* endpoints.
# Set this only when the editor uses a different internal address than the browser.
# Example: http://oxicloud:8086
#OXICLOUD_WOPI_BASE_URL=

# Secret key for signing WOPI access tokens
# Falls back to OXICLOUD_JWT_SECRET if not set
#OXICLOUD_WOPI_SECRET=

# WOPI access token lifetime in seconds (default: 86400 = 24 hours)
#OXICLOUD_WOPI_TOKEN_TTL_SECS=86400

# WOPI lock expiration in seconds (default: 1800 = 30 minutes)
#OXICLOUD_WOPI_LOCK_TTL_SECS=1800

# -----------------------------------------------------------------------------
# NEXTCLOUD COMPATIBILITY
# -----------------------------------------------------------------------------
# Enables the Nextcloud-compatible API layer for clients that speak the
# Nextcloud protocol (desktop sync, mobile apps, Nextcloud Talk, etc.)

# Enable Nextcloud compatibility (default: false)
#OXICLOUD_NEXTCLOUD_ENABLED=false

# Instance ID suffix used in oc:id formatting (default: ocnca)
#OXICLOUD_NEXTCLOUD_INSTANCE_ID=ocnca

# Emulated Nextcloud version reported to clients (default: 28.0.4)
# Clients use this to decide which protocol features to enable.
#OXICLOUD_NEXTCLOUD_VERSION=28.0.4

# -----------------------------------------------------------------------------
# OUTBOUND EMAIL (SMTP)
# -----------------------------------------------------------------------------
#
# Used by the magic-link invitation flow (sharing with someone by email) and
# the login-via-email flow. When HOST is empty (the default), the feature is
# disabled and any endpoint that needs email returns 503.
#
# OxiCloud does NOT spool mail or retry failed sends — each delivery is a
# single attempt. For durability against brief upstream outages, point this
# at a local MTA (Postfix, OpenSMTPD, msmtp-mta, …) configured as a
# smarthost. The local MTA owns the queue and retries against your real
# relay. See docs/config/env.md → "Reliability and retries" for the recipe.

# SMTP server hostname or IP. Empty = feature disabled.
#OXICLOUD_SMTP_HOST=smtp.example.com

# Submission port. Common values:
#   587 = STARTTLS submission (default)
#   465 = implicit TLS submission
#    25 = plain relay (development only)
#OXICLOUD_SMTP_PORT=587

# SASL username for SMTP AUTH. Leave empty for anonymous relay.
#OXICLOUD_SMTP_USER=oxicloud@example.com

# SASL password. Logged as `<set>` / `<anon>` in startup banner (never echoed
# in plaintext).
#OXICLOUD_SMTP_PASS=

# `From:` mailbox. Either a bare address or RFC 5322 name-address form.
#OXICLOUD_SMTP_FROM=OxiCloud <noreply@example.com>

# Transport encryption mode:
#   starttls = port 587 with STARTTLS upgrade (default — recommended)
#   tls      = implicit TLS from the first byte (port 465)
#   none     = no encryption; emits a startup WARN, development only
#OXICLOUD_SMTP_TLS=starttls

# -----------------------------------------------------------------------------
# MAGIC-LINK AUTHENTICATION
# -----------------------------------------------------------------------------
#
# Knobs for the invite-by-email / login-via-email flows. Both rely on SMTP
# being configured above.

# Lifetime of a freshly-minted magic-link token, in hours. After this, the
# background sweeper marks the token expired. Must be > 0.
#OXICLOUD_MAGIC_LINK_TTL_HOURS=24

# Kill switch for the whole magic-link flow.
#   true  = POST /api/grants accepts `subject.type = "email"`; new external
#           users are created lazily and invitation mails are sent.
#   false = the same call returns 403; POST /api/auth/magic-link/send
#           returns the uniform stub response without issuing a token.
# This is the coarse "turn it all off" switch; the per-domain allowlist
# below is the fine-grained version.
#OXICLOUD_ALLOW_EXTERNAL_USERS=true

# Allowlist of email domains accepted when minting a new external user.
# Comma-separated, case-insensitive, exact-match on the post-`@` part of the
# address. Empty (the default) = any domain is allowed, subject to
# OXICLOUD_ALLOW_EXTERNAL_USERS above.
#
# Wildcards / subdomain semantics are intentionally NOT supported:
# `partner.com` does not match `eng.partner.com`. List every subdomain
# explicitly when needed.
#
# Example (only addresses on these two domains can be invited):
#OXICLOUD_EXTERNAL_EMAIL_DOMAINS=partner-a.com,partner-b.io

# Per-sharer rate limit on email-type grants from POST /api/grants. Keyed on
# the authenticated caller's user_id. Hitting the cap returns 429 with
# Retry-After. Default 50/hour — generous for legitimate admin invites,
# protective against a compromised account spamming external users.
#OXICLOUD_MAGIC_LINK_INVITE_PER_CALLER_PER_HOUR=50

# Per-target-email rate limit on POST /api/auth/magic-link/send. Keyed on
# the normalised recipient address (lowercased local, punycode domain).
# Exceeding the cap is silently absorbed (uniform 200 anti-enumeration);
# audit log records the real reason. Authenticated callers bypass this
# limit (a logged-in user resending to themselves should not be throttled).
# Default 5/hour.
#OXICLOUD_MAGIC_LINK_SEND_PER_EMAIL_PER_HOUR=5

# Per-source-IP backstop on POST /api/auth/magic-link/send. Bounds the cost
# of one attacker spreading 5/hr requests across many target addresses.
# Same silently-absorbed behaviour on cap. Honours OXICLOUD_TRUST_PROXY_CIDR
# for client IP resolution. Default 200/hour.
#OXICLOUD_MAGIC_LINK_SEND_PER_IP_PER_HOUR=200

# Policy switch: should magic-link sign-in be offered to users who already
# have a password configured?
#   false (default, strict) — users with a password are audit-logged
#     `has_password` and receive no mail. Their password is the only
#     authentication path; magic-link would weaken it to "mailbox
#     compromise = account compromise".
#   true (lenient)          — users with a password can also request a
#     magic-link as a sign-in path. Aligns with modern SaaS UX
#     (Slack, Notion, etc.). Operators who already treat email as the
#     canonical password-reset channel pick this.
# OIDC-linked users are ALWAYS rejected regardless of this flag — the
# IdP is the security boundary and may enforce MFA we shouldn't bypass.
#OXICLOUD_MAGIC_LINK_OPEN_TO_PASSWORD_USERS=false

# Operator-level kill switch for share-notification emails to internal
# users (the "Alice shared 'Project Alpha' with you" mail that fires when
# `magic_link_eligibility` rejects the recipient — typically password
# users and OIDC users with a known email). When `true` (default), the
# new RecipientNotificationService dispatches plain-notification mail
# on every share. When `false`, internal users discover new shares only
# at next login.
#
# This is a coarser knob than the per-user
# `auth.users.notify_on_share` column (set via the profile "Email me
# when someone shares with me" checkbox): when this env is `false`,
# the per-user opt-in does not matter.
#
# External-user magic-link FIRST-invitations are NOT affected by this
# flag — those always send, because the link is the only way the
# recipient can claim the share for the first time. Subsequent shares
# to an existing external follow the same plain-notification path and
# are subject to both this knob and the per-user opt-out.
#OXICLOUD_NOTIFY_INTERNAL_USERS_ON_SHARE=true

# -----------------------------------------------------------------------------
# INTERNATIONALIZATION (server-rendered surfaces)
# -----------------------------------------------------------------------------
#
# Default locale for server-rendered HTML pages and outbound emails when
# no stronger signal is available. The resolution priority is:
#
#   HTML pages (anonymous, e.g. magic-link landing):
#     1. ?lang=xx query override
#     2. browser Accept-Language header (q-weighted)
#     3. this default
#
#   Emails to a known user:
#     1. user.preferred_locale column
#     2. this default
#
# Supported locales are discovered at boot by listing static/locales/*.json,
# so adding a 17th locale is a file-drop operation (no rebuild required).
# This variable must match one of the discovered codes — startup fails fast
# if you set OXICLOUD_DEFAULT_LOCALE=xx and no static/locales/xx.json exists.
#
# Default: "en". Today's shipped locales: ar, de, en, es, fa, fr, hi, it,
# ja, ko, nl, pl, pt, ru, zh, zh-TW.
#OXICLOUD_DEFAULT_LOCALE=en

# -----------------------------------------------------------------------------
# PROXY
# -----------------------------------------------------------------------------

# Use this section if you are running OxiCloud behind a reverse proxy.

# Trusted Proxy CIDRs — comma-separated list of CIDR blocks whose
# X-Forwarded-For / X-Real-IP headers will be trusted for client IP detection.
# Leave unset if OxiCloud is directly exposed (no proxy).
# Example: 127.0.0.1/32,10.0.0.0/8,172.16.0.0/12,::1/128
#OXICLOUD_TRUST_PROXY_CIDR=

# DEPRECATED — use OXICLOUD_TRUST_PROXY_CIDR instead
#OXICLOUD_TRUST_PROXY_HEADERS=

# -----------------------------------------------------------------------------
# MEMORY ALLOCATOR TUNING (IMPORTANT FOR RAM USAGE)
# -----------------------------------------------------------------------------
# OxiCloud uses mimalloc as its global memory allocator for performance.
# By default, mimalloc RETAINS freed memory in internal free-lists instead of
# returning it to the operating system. This causes the process RSS to grow
# over time (e.g., after large file uploads or password hashing) and never
# shrink back — even though the application has already freed that memory.
#
# In containerized / memory-constrained environments (Docker, K8s, VPS with
# limited RAM), this is critical: without these settings, the container can
# appear to "leak" hundreds of MiB that are actually just retained by the
# allocator.
#
# These variables are read directly by the mimalloc C library at startup.
# They are NOT OxiCloud-specific — they are part of mimalloc's official API.
# Docs: https://microsoft.github.io/mimalloc/environment.html

# MIMALLOC_PURGE_DELAY: Delay (in ms) before freed memory is returned to the OS.
#   0  = return immediately (RECOMMENDED for Docker / limited RAM)
#   -1 = never return (maximum performance, highest RAM usage)
#   10 = mimalloc default (slight delay for reuse optimization)
# Setting this to 0 can reduce idle RAM by 80-120 MiB in typical deployments.
MIMALLOC_PURGE_DELAY=0

# MIMALLOC_ALLOW_LARGE_OS_PAGES: Use 2 MiB huge pages for allocations.
#   0 = disabled (RECOMMENDED for Docker — avoids RSS inflation from THP)
#   1 = enabled (better TLB performance on bare-metal servers with plenty of RAM)
# When enabled with Linux Transparent Huge Pages (THP), partially-used 2 MiB
# pages inflate the reported RSS by up to 20-30 MiB.
MIMALLOC_ALLOW_LARGE_OS_PAGES=0