database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-07 00:04:31 +03:00
Code Activity

MDEV-26519: Improved histograms

Browse Source 
Save extra information in the histogram:

    "target_histogram_size": nnn,
    "collected_at": "(date and time)",
    "collected_by": "(server version)",
This commit is contained in:
Sergei Petrunia
2021-12-03 18:08:10 +03:00
parent a0916cf5a2
commit c2d2c1e727
8 changed files with 579 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
sql/opt_histogram_json.h
View File

@@ -24,6 +24,11 @@
Histogram format in JSON:
{
// The next three are saved but not currently analyzed:
"target_histogram_size": nnn,
"collected_at": "(date and time)",
"collected_by": "(server version)",
"histogram_hb": [
{ "start": "value", "size":nnn.nn, "ndv": nnn },
...