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Cache the local server statistics object

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By storing the server statistics object in side the session, the lookup
involved in getting a worker-local value is avoided. Since the lookup is
done multiple times for a single query, it is beneficial to store it in
the session.

As the worker-local value is never deleted, it is safe to store a
reference to it in the session. It is also never updated concurrently so
no atomic operations are necessary.
This commit is contained in:
Markus Mäkelä
2018-12-09 15:01:52 +02:00
parent 1fa3b133c7
commit 9adbd2f8f0
6 changed files with 19 additions and 14 deletions
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4
server/modules/routing/readwritesplit/readwritesplit.cc
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@ -107,9 +107,9 @@ const Stats& RWSplit::stats() const
return m_stats;
}
ServerStats& RWSplit::server_stats(SERVER* server)
SrvStatMap& RWSplit::local_server_stats()
{
return (*m_server_stats)[server];
return *m_server_stats;
}
maxscale::SrvStatMap RWSplit::all_server_stats() const