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| author | Simon Riggs | 2017-06-23 17:58:46 +0000 |
|---|---|---|
| committer | Simon Riggs | 2017-06-23 17:58:46 +0000 |
| commit | 9ea3c64124af039219aa5030d7af675dce5daa60 (patch) | |
| tree | 5d32787a7dd1973e9cbebc0cdae02f70c9dc540f /doc/src | |
| parent | a79122b06194927d2b79465f335b94f2b4472816 (diff) | |
Improve replication lag interpolation after idle period
After sitting idle and fully replayed for a while and then encountering
a new burst of WAL activity, we interpolate between an ancient sample and the
not-yet-reached one for the new traffic. That produced a corner case report
of lag after receiving first new reply from standby, which might sometimes
be a large spike.
Correct this by resetting last_read time and handle that new case.
Author: Thomas Munro
Diffstat (limited to 'doc/src')
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