cli: Fix number of args expected by debug gossip-values#24752
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Make this Args: cobra.NoArgs, so that we still have argument count validation.
Fixes cockroachdb#24751 Release note: None
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24529: distsql: collect tableReader stats and output to trace r=asubiotto a=asubiotto
This PR is split into two commits. The first commit lays the groundwork for stat collection code. The stats are modeled as a proto to be sent over the wire in the future (we will be sending these stats as metadata). The second commit modifies the tableReader to use this InputStatCollector to count the number of rows it reads. Example usage:
```
root@:26257/> SELECT COUNT(*) FROM test.xyz;
+-------+
| count |
+-------+
| 7 |
+-------+
(1 row)
Time: 257.249037ms
root@:26257/> SET tracing = ON;
SET
Time: 362.575µs
root@:26257/> SELECT x,y,z FROM test.xyz ORDER BY x;
+---+---+------+
| x | y | z |
+---+---+------+
| 1 | 1 | NULL |
| 1 | 1 | 2 |
| 1 | 1 | 2 |
| 1 | 2 | 1 |
| 2 | 2 | 3 |
| 4 | 5 | 6 |
| 4 | 1 | 6 |
+---+---+------+
(7 rows)
Time: 207.334037ms
root@:26257/> SHOW TRACE FOR SESSION;
... rest of trace elided ...
| 2018-04-05 20:53:01.571467+00:00 | 21s794ms540µs951ns | waiting for read lock | [n1,s1,r23/1:/Table/5{2-3}] | | /cockroach.roachpb.Internal/Batch | 13 |
| 2018-04-05 20:53:01.777272+00:00 | 22s345µs429ns | read completed | [n1,s1,r23/1:/Table/5{2-3}] | | /cockroach.roachpb.Internal/Batch | 13 |
| 2018-04-05 20:53:01.777435+00:00 | 22s508µs797ns | stat summary for tableReader input | [client=[::1]:64047,user=root,n1,TableReader] | | table reader | 11 |
| | | | | | | |
| | | rows read 7 | | | | |
... rest of trace elided ...
```
And then through jaeger:
<img width="1427" alt="screen shot 2018-04-05 at 4 53 55 pm" src="https://user-images.githubusercontent.com/10560359/38392141-740ae6d8-38f4-11e8-9406-2c167142eba6.png">
Note that we can't currently run `SHOW TRACE FOR <QUERY>` in distsql mode, which I hope to fix soon (#16562)
Any suggestions to improve the output welcome.
cc @knz @jordanlewis
24715: opt: Fix flaky test r=andy-kimball a=andy-kimball
Update the TestNoMallocs to use the SucceedsSoon method in order
to repeatedly retry until zero memory allocations are detected.
Release note: None
24752: cli: Fix number of args expected by `debug gossip-values` r=a-robinson a=a-robinson
Fixes #24751
Release note: None
It looks like the problem is that my original usage string (`gossip-values <directory>`) was badly copied and pasted from other debug commands, and then assumed necessary by #24399 when in reality no positional argument is used by the command.
Co-authored-by: Alfonso Subiotto Marqués <alfonso@cockroachlabs.com>
Co-authored-by: Andrew Kimball <andyk@cockroachlabs.com>
Co-authored-by: Alex Robinson <alexdwanerobinson@gmail.com>
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Fixes #24751
Release note: None
It looks like the problem is that my original usage string (
gossip-values <directory>) was badly copied and pasted from other debug commands, and then assumed necessary by #24399 when in reality no positional argument is used by the command.