When splitting windows into their own individual tables, do not wait for
empty tables to be read. Empty tables may never be read so waiting for
them can result in a deadlock.
This was found while writing a test case for in progress work and so a
test case for this condition will follow in a future commit.
This commit adds `mincore.Limiter` which throttles page faults caused
by mmap() data. It works by periodically calling `mincore()` to determine
which pages are not resident in memory and using `rate.Limiter` to
throttle accessing using a token bucket algorithm.
* feat(tsdb): SHOW TAG KEYS (no time) query using only TSI data.
* fix(tsdb): Allow for earlier return when scanning during show tag keys.
* fix(tsdb): Speed things up by using the key merger to reduce allocs.
* chore(tsm1): Fix golint.
* fix(tsdb): Remove sorting, because these keys should already be sorted.
* fix(tsdb): Remove dead code to placate the linter.
Previously windowed aggregate tables would construct the _start and
_stop arrays before checking if the underlying array cursor was empty.
The table would therefore report itself as non-empty even though
there were no points within the table's time range. Now we check if
the underlying array cursor is empty before we construct any output
arrays. If the cursor is empty, meaning the series is empty, the
table will be dropped.
Fixes https://github.com/influxdata/influxdb/issues/18704.
* refactor: migrator and introduce Store.(Create|Delete)Bucket
feat: kvmigration internal utility to create / managing kv store migrations
fix: ensure migrations applied in all test cases
* chore: update kv and migration documentation
* fix(storage): Push-down a predicate to match tags for SHOW MEASUREMENTS calls.
* chore: Address feedback.
* fix(tsm1): Split behavior based on existence of predicate for show measurements.
* fix(tsm1): Allow parenthesis expression on the LHS of a predicate.
* fix(tsm1): Create a separate tag predicate verifier that rejects negative comparisons.
* fix(tsm1): Additional test cases for show measurements with predicate.
Storage should not have a dependency on libflux. This commit removes
some constants that were used from the flux universe package and
replaces them with local copies so that storage no longer has a
dependecy on the universe package.
Stuart Carnie
Brett Buddin
Edd Robinson
Yiqun (Ethan) Zhang
jlapacik
Jonathan A. Sternberg
Ben Johnson
Christopher M. Wolff
George