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feat(clamav): reduce RAM usage via ConcurrentDatabaseReload no and MaxThreads 2

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docs(clamav): add comments explaining ConcurrentDatabaseReload and MaxThreads changes

Agent-Logs-Url: https://github.com/nextcloud/all-in-one/sessions/3b943282-bf8e-469a-acee-2a0b0d699112
Co-Authored-By: szaimen <42591237+szaimen@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot]
2026-04-20 15:18:36 +00:00
committed by Simon L.
parent 5fe6adc62a
commit 7031310257
2 changed files with 9 additions and 1 deletions
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9
Containers/clamav/Dockerfile
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@@ -13,6 +13,15 @@ RUN set -ex; \
sed -i "s|#\?PCREMaxFileSize.*|PCREMaxFileSize 2000M|g" /etc/clamav/clamd.conf; \
# StreamMaxLength must be synced with av_stream_max_length inside the Nextcloud files_antivirus plugin
sed -i "s|#\?StreamMaxLength.*|StreamMaxLength 2000M|g" /etc/clamav/clamd.conf; \
# By default clamd keeps the old signature database in RAM while loading the new one,
# briefly doubling memory usage (~1 GB extra) during each freshclam update cycle.
# Setting ConcurrentDatabaseReload to "no" makes clamd unload the old database first,
# eliminating that transient peak and significantly reducing maximum RAM consumption.
sed -i "s|#\?ConcurrentDatabaseReload.*|ConcurrentDatabaseReload no|g" /etc/clamav/clamd.conf; \
# The default thread pool is 10-12 threads, each reserving its own stack and scan buffers.
# The Nextcloud antivirus plugin sends one file at a time, so 2 threads are sufficient
# and avoids the idle per-thread memory overhead of the larger default pool.
sed -i "s|#\?MaxThreads.*|MaxThreads 2|g" /etc/clamav/clamd.conf; \
sed -i "s|#\?TCPSocket|TCPSocket|g" /etc/clamav/clamd.conf; \
sed -i "s|^LocalSocket .*|LocalSocket /tmp/clamd.sock|g" /etc/clamav/clamd.conf; \
sed -i "s|Example| |g" /etc/clamav/clamav-milter.conf; \

1
Containers/clamav/supervisord.conf
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@@ -1,6 +1,5 @@
[supervisord]
nodaemon=true
nodaemon=true
logfile=/var/log/supervisord/supervisord.log
pidfile=/var/run/supervisord/supervisord.pid
childlogdir=/var/log/supervisord/