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-rw-r--r--erts/doc/src/erl.xml31
1 files changed, 31 insertions, 0 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 93d1289e8d..7cdb3a4dfe 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -1042,6 +1042,37 @@
the emulator will be allowed to spend writing a crash dump. When
the given number of seconds have elapsed, the emulator will be
terminated by a SIGALRM signal.</p>
+
+ <p> If the environment variable is <em>not</em> set or it is set to zero seconds, <c><![CDATA[ERL_CRASH_DUMP_SECONDS=0]]></c>,
+ the runtime system will not even attempt to write the crash dump file. It will just terminate.
+ </p>
+ <p> If the environment variable is set to negative valie, e.g. <c><![CDATA[ERL_CRASH_DUMP_SECONDS=-1]]></c>,
+ the runtime system will wait indefinitely for the crash dump file to be written.
+ </p>
+ <p> This environment variable is used in conjuction with
+ <seealso marker="kernel:heart"><c>heart</c></seealso> if <c>heart</c> is running:
+ </p>
+ <taglist>
+ <tag><c><![CDATA[ERL_CRASH_DUMP_SECONDS=0]]></c></tag>
+ <item><p>
+ Suppresses the writing a crash dump file entirely,
+ thus rebooting the runtime system immediately.
+ This is the same as not setting the environment variable.
+ </p>
+ </item>
+ <tag><c><![CDATA[ERL_CRASH_DUMP_SECONDS=-1]]></c></tag>
+ <item><p>Setting the environment variable to a negative value will cause the
+ termination of the runtime system to wait until the crash dump file
+ has been completly written.
+ </p>
+ </item>
+ <tag><c><![CDATA[ERL_CRASH_DUMP_SECONDS=S]]></c></tag>
+ <item><p>
+ Will wait for <c>S</c> seconds to complete the crash dump file and
+ then terminate the runtime system.
+ </p>
+ </item>
+ </taglist>
</item>
<tag><c><![CDATA[ERL_AFLAGS]]></c></tag>
<item>