NAME

       coredump.conf, coredump.conf.d - Core dump storage configuration files

SYNOPSIS

       /etc/systemd/coredump.conf

       /etc/systemd/coredump.conf.d/*.conf

       /run/systemd/coredump.conf.d/*.conf

       /usr/lib/systemd/coredump.conf.d/*.conf

DESCRIPTION

       These files configure the behavior of systemd-coredump(8), a handler for core dumps
       invoked by the kernel. Whether systemd-coredump is used is determined by the kernel's
       kernel.core_pattern sysctl(8) setting. See systemd-coredump(8) and core(5) pages for the
       details.

CONFIGURATION DIRECTORIES AND PRECEDENCE

       The default configuration is defined during compilation, so a configuration file is only
       needed when it is necessary to deviate from those defaults. By default, the configuration
       file in /etc/systemd/ contains commented out entries showing the defaults as a guide to
       the administrator. This file can be edited to create local overrides.

       When packages need to customize the configuration, they can install configuration snippets
       in /usr/lib/systemd/*.conf.d/. Files in /etc/ are reserved for the local administrator,
       who may use this logic to override the configuration files installed by vendor packages.
       The main configuration file is read before any of the configuration directories, and has
       the lowest precedence; entries in a file in any configuration directory override entries
       in the single configuration file. Files in the *.conf.d/ configuration subdirectories are
       sorted by their filename in lexicographic order, regardless of which of the subdirectories
       they reside in. When multiple files specify the same option, for options which accept just
       a single value, the entry in the file with the lexicographically latest name takes
       precedence. For options which accept a list of values, entries are collected as they occur
       in files sorted lexicographically. It is recommended to prefix all filenames in those
       subdirectories with a two-digit number and a dash, to simplify the ordering of the files.

       To disable a configuration file supplied by the vendor, the recommended way is to place a
       symlink to /dev/null in the configuration directory in /etc/, with the same filename as
       the vendor configuration file.

OPTIONS

       All options are configured in the "[Coredump]" section:

       Storage=
           Controls where to store cores. One of "none", "external", and "journal". When "none",
           the core dumps will be logged (including the backtrace if possible), but not stored
           permanently. When "external" (the default), cores will be stored in
           /var/lib/systemd/coredump/. When "journal", cores will be stored in the journal and
           rotated following normal journal rotation patterns.

           When cores are stored in the journal, they might be compressed following journal
           compression settings, see journald.conf(5). When cores are stored externally, they
           will be compressed by default, see below.

       Compress=
           Controls compression for external storage. Takes a boolean argument, which defaults to
           "yes".

       ProcessSizeMax=
           The maximum size in bytes of a core which will be processed. Core dumps exceeding this
           size will be logged, but the backtrace will not be generated and the core will not be
           stored.

       ExternalSizeMax=, JournalSizeMax=
           The maximum (uncompressed) size in bytes of a core to be saved.

       MaxUse=, KeepFree=
           Enforce limits on the disk space taken up by externally stored core dumps.  MaxUse=
           makes sure that old core dumps are removed as soon as the total disk space taken up by
           core dumps grows beyond this limit (defaults to 10% of the total disk size).
           KeepFree= controls how much disk space to keep free at least (defaults to 15% of the
           total disk size). Note that the disk space used by core dumps might temporarily exceed
           these limits while core dumps are processed. Note that old core dumps are also removed
           based on time via systemd-tmpfiles(8). Set either value to 0 to turn off size-based
           clean-up.

       The defaults for all values are listed as comments in the template
       /etc/systemd/coredump.conf file that is installed by default.

SEE ALSO

       systemd-journald.service(8), coredumpctl(1), systemd-tmpfiles(8)