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authorSverker Eriksson <[email protected]>2017-05-24 15:30:42 +0200
committerSverker Eriksson <[email protected]>2017-05-24 15:30:42 +0200
commitf8dadb1c97e952e79e4df558c76f99664757441c (patch)
tree16b1b4d5d992ecf63261dbac1f57cf5e6f70b1f2 /erts
parent6062563734a9b71c9670860bff85f661f74eb7af (diff)
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erts: Clarify ERL_CRASH_DUMP_SECONDS docs
especially default behavior without -heart, which is wait indefinitely for crash dump.
Diffstat (limited to 'erts')
-rw-r--r--erts/doc/src/erl.xml35
1 files changed, 15 insertions, 20 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 8b152b83f5..638e88ca31 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -1553,32 +1553,27 @@
<item>
<p><em>Unix systems</em>: This variable gives the number of seconds
that the emulator is allowed to spend writing a crash dump. When the
- given number of seconds have elapsed, the emulator is terminated by a
- <c>SIGALRM</c> signal.</p>
- <p>If the variable is <em>not</em> set or set to <c>0</c> seconds
- (<c><![CDATA[ERL_CRASH_DUMP_SECONDS=0]]></c>), the runtime system does
- not even attempt to write the crash dump file. It only terminates.</p>
- <p>If the variable is set to negative value, such as
- <c><![CDATA[ERL_CRASH_DUMP_SECONDS=-1]]></c>, the runtime system
- waits indefinitely for the crash dump file to be written.</p>
- <p>This variable is used with <seealso marker="kernel:heart">
- <c>heart(3)</c></seealso> if <c>heart</c> is running:</p>
+ given number of seconds have elapsed, the emulator is terminated.</p>
<taglist>
<tag><c><![CDATA[ERL_CRASH_DUMP_SECONDS=0]]></c></tag>
- <item>Suppresses the writing a crash dump file entirely, thus
- rebooting the runtime system immediately. This is the same as not
- setting the environment variable.
+ <item>If the variable is set to <c>0</c> seconds, the runtime system does
+ not even attempt to write the crash dump file. It only terminates.
+ This is the default if option <c>-heart</c> is passed to <c>erl</c>
+ and <c>ERL_CRASH_DUMP_SECONDS</c> is not set.
+ </item>
+ <tag><c><![CDATA[ERL_CRASH_DUMP_SECONDS=S]]></c></tag>
+ <item>If the variable is set to a positive value <c>S</c>,
+ wait for <c>S</c> seconds to complete the crash dump file and
+ then terminates the runtime system with a <c>SIGALRM</c> signal.
</item>
<tag><c><![CDATA[ERL_CRASH_DUMP_SECONDS=-1]]></c></tag>
- <item>Setting the environment variable to a negative value causes the
- termination of the runtime system to wait until the crash dump file
- has been completly written.
- </item>
- <tag><c><![CDATA[ERL_CRASH_DUMP_SECONDS=S]]></c></tag>
- <item>Waits for <c>S</c> seconds to complete the crash dump file and
- then terminates the runtime system.
+ <item>A negative value causes the termination of the runtime system
+ to wait indefinitely until the crash dump file has been completly
+ written. This is the default if option <c>-heart</c> is <em>not</em>
+ passed to <c>erl</c> and <c>ERL_CRASH_DUMP_SECONDS</c> is not set.
</item>
</taglist>
+ <p>See also <seealso marker="kernel:heart"><c>heart(3)</c></seealso>.</p>
</item>
<tag><c><![CDATA[ERL_CRASH_DUMP_BYTES]]></c></tag>
<item>