ircd:Ⓜ️:acquire: Add conf items to default some opts; rename and raise submit max.

include/ircd/m/acquire.h

@@ -23,6 +23,9 @@ struct ircd::m::acquire
 	struct result;
 
 	static log::log log;
+	static conf::item<size_t> fetch_max;
+	static conf::item<size_t> submit_max;
+	static conf::item<size_t> attempt_max;
 	static uint64_t ids;
 
 	const uint64_t id {++ids};
@@ -114,14 +117,14 @@ struct ircd::m::acquire::opts
 	size_t rounds {-1UL};
 
 	/// Total event limit over all operations.
-	size_t fetch_max {-1UL};
+	size_t fetch_max {acquire::fetch_max};
 
 	/// Limit the number of requests in flight at any given time.
-	size_t fetch_width {128};
+	size_t submit_max {acquire::submit_max};
 
 	/// Fetch attempt cap passed to m::fetch, because the default there is
 	/// unlimited and that's usually a waste of time in practice.
-	size_t attempt_max {16};
+	size_t attempt_max {acquire::attempt_max};
 
 	/// Limit on the depth of leafs pursued by the timeline acquisition.
 	size_t leaf_depth {0};

matrix/acquire.cc

@@ -14,6 +14,27 @@ ircd::m::acquire::log
 	"m.acquire"
 };
 
+decltype(ircd::m::acquire::fetch_max)
+ircd::m::acquire::fetch_max
+{
+	{ "name",     "ircd.m.acquire.fetch.max" },
+	{ "default",  -1L                        },
+};
+
+decltype(ircd::m::acquire::submit_max)
+ircd::m::acquire::submit_max
+{
+	{ "name",     "ircd.m.acquire.submit.max" },
+	{ "default",  256                         },
+};
+
+decltype(ircd::m::acquire::attempt_max)
+ircd::m::acquire::attempt_max
+{
+	{ "name",     "ircd.m.acquire.attempt.max" },
+	{ "default",  16                           },
+};
+
 decltype(ircd::m::acquire::ids)
 ircd::m::acquire::ids;
 
@@ -794,7 +815,7 @@ bool
 ircd::m::acquire::full()
 const noexcept
 {
-	return fetching.size() >= opts.fetch_width;
+	return fetching.size() >= opts.submit_max;
 }
 
 //

matrix/fetch.cc

@@ -72,7 +72,7 @@ decltype(ircd::m::fetch::requests_max)
 ircd::m::fetch::requests_max
 {
 	{ "name",     "ircd.m.fetch.requests.max" },
-	{ "default",  1024L                       },
+	{ "default",  2048L                       },
 };
 
 decltype(ircd::m::fetch::backfill_limit_default)