coredump.conf

systemd
coredump.conf 5
coredump.conf coredump.conf.d Core dump storage configuration files

`/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.

## 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 may 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 may be stored, but the backtrace will not be generated. Like other sizes in this same config file, the usual suffixes to the base of 1024 are allowed (B, K, M, G, T, P, and E). Defaults to 1G on 32bit systems, 32G on 64bit systems.

  Setting `Storage=none` and `ProcessSizeMax=0` disables all coredump handling except for a log entry.

`ExternalSizeMax=`
`JournalSizeMax=`

  The maximum (compressed or uncompressed) size in bytes of a core to be saved in separate files on disk (default: 1G on 32bit, 32G on 64bit systems) or in the journal (default: 10M). Unit suffixes are allowed just as in `ProcessSizeMax=`.

`ExternalSizeMax=infinity` sets the core size to unlimited.

`MaxUse=`
`KeepFree=`

  Enforce limits on the disk space, specified in bytes, taken up by externally stored core dumps. Unit suffixes are allowed just as in `ProcessSizeMax=`. `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 cleanup.

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