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ircd:Ⓜ️:events::source: Disable readahead for descending access pattern.

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This commit is contained in:
Jason Volk 2020-10-11 17:19:57 -07:00
parent 6b915da4ab
commit 325145ab29
1 changed files with 2 additions and 1 deletions
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3
matrix/events.cc
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@ -320,6 +320,7 @@ ircd::m::events::source::for_each(const range &range,
db::get::NO_CHECKSUM
};
gopts.readahead = size_t(readahead);
gopts.readahead &= boolmask<size_t>(ascending);
auto it
{
@ -385,8 +386,8 @@ ircd::m::events::content::for_each(const closure &closure)
db::get::NO_CACHE,
db::get::NO_CHECKSUM
};
gopts.readahead = size_t(readahead);
auto it(column.begin(gopts));
for(; it; ++it)
{