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ircd::db: Use a zero soft-limit to yield all requests when saturated; prefetch condition.

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This commit is contained in:
Jason Volk 2018-12-27 16:13:49 -08:00
parent 5ae69dde95
commit c82382ea2c
1 changed files with 4 additions and 0 deletions
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4
ircd/db.cc
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@ -109,6 +109,7 @@ ircd::db::request
"db req",
size_t(request_pool_stack_size),
0, // don't prespawn because this is static
0, // zero-size queue will yield submitter
};
/// This mutex is necessary to serialize entry into rocksdb's write impl
@ -9859,6 +9860,9 @@ ircd::db::prefetch(column &column,
if(cached(column, key, gopts))
return;
if(!request.avail())
return;
request([column(column), key(std::string(key)), gopts]
() mutable
{