Given that NtWaitForWorkViaWorkerFactory is not anything we can influence much (that's a threadpool management), this makes my_access() the top-1 hotspot
However we do not need to instantly recheck if directory is still there. If it was there, and there was no "drop database", it remains in place. We can assume, that removing database directory manually outside of the server does not happen (or those who do punish themselves), we can cache the results of this operation, speeding up the connect, and every "USE db"
Sergej Vojtovich reported my_access overhead of 2-3% on Linux in connect/disconnect test. Not as big as on Windows, but still quite measurable.
Vladislav Vaintroub
added a comment - - edited Sergej Vojtovich reported my_access overhead of 2-3% on Linux in connect/disconnect test. Not as big as on Windows, but still quite measurable.
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Vladislav Vaintroub
Vladislav Vaintroub
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Bug
Major
Sergej Vojtovich reported my_access overhead of 2-3% on Linux in connect/disconnect test. Not as big as on Windows, but still quite measurable.