Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Add circuit breaker variable #20129

Open
wants to merge 3 commits into
base: master
Choose a base branch
from
+9 −0
Open

Add circuit breaker variable #20129

Changes from 1 commit
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
bf8ec48
add circuit breaker variable
rleungx Jan 23, 2025
c276d98
Apply suggestions from code review
hfxsd Jan 23, 2025
224b5d5
Update system-variables.md
hfxsd Jan 23, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 10 additions & 0 deletions system-variables.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5943,6 +5943,16 @@ For details, see [Identify Slow Queries](/identify-slow-queries.md).
> - `PARALLEL` and `PARALLEL-FAST` modes are incompatible with [`tidb_tso_client_batch_max_wait_time`](#tidb_tso_client_batch_max_wait_time-new-in-v530) and [`tidb_enable_tso_follower_proxy`](#tidb_enable_tso_follower_proxy-new-in-v530). If either [`tidb_tso_client_batch_max_wait_time`](#tidb_tso_client_batch_max_wait_time-new-in-v530) is set to a non-zero value or [`tidb_enable_tso_follower_proxy`](#tidb_enable_tso_follower_proxy-new-in-v530) is enabled, configuring `tidb_tso_client_rpc_mode` does not take effect, and TiDB always works in `DEFAULT` mode.
> - `PARALLEL` and `PARALLEL-FAST` modes are designed to reduce the average time for retrieving TS in TiDB. In situations with significant latency fluctuations, such as long-tail latency or latency spikes, these two modes might not provide any remarkable performance improvements.


### tidb_cb_pd_metadata_error_rate_threshold_pct
hfxsd marked this conversation as resolved.
Show resolved Hide resolved

- Scope: GLOBAL
- Persists to cluster: Yes
- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No
- Default value: `0`
- Range: `[0, 100]`
- This variable controls whether TiDB triggers the circuit breaker according to the error rate percentage of the specific requests sending to PD.
hfxsd marked this conversation as resolved.
Show resolved Hide resolved

### tidb_ttl_delete_rate_limit <span class="version-mark">New in v6.5.0</span>

> **Note:**
Expand Down
Loading