diff options
Diffstat (limited to 'erts/doc/src/erl.xml')
| -rw-r--r-- | erts/doc/src/erl.xml | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml index 133f160dc9..ed1b0880b4 100644 --- a/erts/doc/src/erl.xml +++ b/erts/doc/src/erl.xml @@ -460,11 +460,14 @@ <tag><c><![CDATA[-remsh Node]]></c></tag> <item> <p>Starts Erlang with a remote shell connected to - <c><![CDATA[Node]]></c>.</p> + <c><![CDATA[Node]]></c>. Requires either <c><![CDATA[-name]]></c> + or <c><![CDATA[-sname]]></c> to be given. If <c><![CDATA[Node]]></c> + does not contain a hostname, one is automatically taken from + <c><![CDATA[-name]]></c> or <c><![CDATA[-sname]]></c></p> </item> <tag><c><![CDATA[-rsh Program]]></c></tag> <item> - <p>Specifies an alternative to <c><![CDATA[rsh]]></c> for starting a + <p>Specifies an alternative to <c><![CDATA[ssh]]></c> for starting a slave node on a remote host; see <seealso marker="stdlib:slave"><c>slave(3)</c></seealso>.</p> </item> @@ -636,6 +639,29 @@ produces a crash dump. On Unix systems, sending an emulator process a <c>SIGUSR1</c> signal also forces a crash dump.</p> </item> + <tag><marker id="+dcg"/><c><![CDATA[+rg DecentralizedCounterGroupsLimit]]></c></tag> + <item> + <p>Limits the number of decentralized counter groups used by + decentralized counters optimized for update operations in the + Erlang runtime system. By default, the limit is 256.</p> + <p>When the number of schedulers is less than or equal to the + limit, each scheduler has its own group. When the + number of schedulers is larger than the groups limit, + schedulers share groups. Shared groups degrade + the performance for updating counters while many reader groups + degrade the performance for reading counters. So, the limit is a tradeoff + between performance for update operations and performance for + read operations. Each group consumes 64 bytes in each + counter.</p> + <p>Notice that a runtime system using decentralized + counter groups benefits from <seealso marker="#+sbt">binding + schedulers to logical processors</seealso>, as the groups are + distributed better between schedulers with this option.</p> + <p>This option only affects decentralized counters used for + the counters that are keeping track of the memory consumption + and the number of terms in ETS tables of type ordered_set with + the write_concurrency option activated.</p> + </item> <tag><marker id="+e"/><c><![CDATA[+e Number]]></c></tag> <item> <p>Sets the maximum number of ETS tables. This limit is @@ -1552,15 +1578,6 @@ parameter determines. The lingering prevents repeated deletions and insertions in the tables from occurring.</p> </item> - <tag><marker id="+ztma"/><c>+ztma true | false</c></tag> - <item> - <p>Enables or disables support for tuple module apply in - the emulator. This is a transitional flag for running code - that uses parameterized modules and was compiled under OTP 20 - or earlier. For future compatibility, the modules will need - to be recompiled with the +tuple_calls compiler option. - Defaults to false.</p> - </item> </taglist> </item> </taglist> |