wbtiger
/
foundationdb
mirror of https://github.com/apple/foundationdb.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

update document

This commit is contained in:
Xiaoxi Wang 2022-08-11 12:14:24 -07:00
parent d724fc1be2
commit fe45b4f0b2
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
design/data-distributor-internals.md
View File

@ -165,9 +165,9 @@ CPU utilization. This metric is in a positive relationship with “FinishedQueri
```
) for different relocation reason (`Other`, `RebalanceDisk` and so on) in different phase within `DD_QUEUE_COUNTER_REFRESH_INTERVAL` (default 60) seconds. For example,
```xml
<Event Severity="10" Time="1659974950.984176" DateTime="2022-08-08T16:09:10Z" Type="DDQueueServerCounter" ID="0000000000000000" ServerId="0000000000000004" Other="0 1 3 2" RebalanceDisk="0 0 1 4" RebalanceRead="2 0 0 5" MergeShardPQSD="0 0 1 0" SizeSplitPQSD="0 0 0 0" WriteSplitPQSD="0 0 0 0" ThreadID="9733255463206053180" Machine="0.0.0.0:0" LogGroup="default" Roles="TS" />
<Event Severity="10" Time="1659974950.984176" DateTime="2022-08-08T16:09:10Z" Type="DDQueueServerCounter" ID="0000000000000000" ServerId="0000000000000004" Other_PQSD="0 1 3 2" RebalanceDisk_PQSD="0 0 1 4" RebalanceRead_PQSD="2 0 0 5" MergeShard_PQSD="0 0 1 0" SizeSplit_PQSD="0 0 5 0" WriteSplit_PQSD="1 0 0 0" ThreadID="9733255463206053180" Machine="0.0.0.0:0" LogGroup="default" Roles="TS" />
```
`RebalanceRead="2 0 0 5"` means server `0000000000000004` has been selected as for read balancing for twice, but it's not queued and executed yet. This server also has been a destination for read balancing for 5 times in the past 1 min. To avoid spammy traces, if is enabled with knob `DD_QUEUE_COUNTER_SUMMARIZE = true`, event `DDQueueServerCounterTooMany` will summarize the unreported servers that involved in launched relocations:
`RebalanceRead_PQSD="2 0 0 5"` means server `0000000000000004` has been selected as for read balancing for twice, but it's not queued and executed yet. This server also has been a destination for read balancing for 5 times in the past 1 min. Note that the field will be skipped if all 4 numbers are 0. To avoid spammy traces, if is enabled with knob `DD_QUEUE_COUNTER_SUMMARIZE = true`, event `DDQueueServerCounterTooMany` will summarize the unreported servers that involved in launched relocations (aka. `LaunchedSource`, `LaunchedDest` count are non-zero):
```xml
<Event Severity="10" Time="1660095057.995837" DateTime="2022-08-10T01:30:57Z" Type="DDQueueServerCounterTooMany" ID="0000000000000000" RemainedLaunchedSources="000000000000007f,00000000000000d9,00000000000000e8,000000000000014c,0000000000000028,00000000000000d6,0000000000000067,000000000000003e,000000000000007d,000000000000000a,00000000000000cb,0000000000000106,00000000000000c1,000000000000003c,000000000000016e,00000000000000e4,000000000000013c,0000000000000016,0000000000000179,0000000000000061,00000000000000c2,000000000000005a,0000000000000001,00000000000000c9,000000000000012a,00000000000000fb,0000000000000146," RemainedLaunchedDestinations="0000000000000079,0000000000000115,000000000000018e,0000000000000167,0000000000000135,0000000000000139,0000000000000077,0000000000000118,00000000000000bb,0000000000000177,00000000000000c0,000000000000014d,000000000000017f,00000000000000c3,000000000000015c,00000000000000fb,0000000000000186,0000000000000157,00000000000000b6,0000000000000072,0000000000000144," ThreadID="1322639651557440362" Machine="0.0.0.0:0" LogGroup="default" Roles="TS" />
```