modify default value for sync max parallel to mitigate oom on dn(#26763)

[MrPresent-Han]

related: #25763

[mergify]

@MrPresent-Han E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[codecov]

Codecov Report

Merging #26231 (a4397b5) into master (fb5d809) will increase coverage by 0.34%.
Report is 1 commits behind head on master.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #26231      +/-   ##
==========================================
+ Coverage   82.22%   82.57%   +0.34%     
==========================================
  Files         817      811       -6     
  Lines      111187   108762    -2425     
==========================================
- Hits        91427    89810    -1617     
+ Misses      16652    15822     -830     
- Partials     3108     3130      +22     

Files Changed	Coverage Δ
pkg/util/paramtable/component_param.go	98.13% <100.00%> (ø)

... and 176 files with indirect coverage changes

[MrPresent-Han]

/run-cpu-e2e

[MrPresent-Han]

/run-cpu-e2e

[mergify]

@MrPresent-Han E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[mergify]

@MrPresent-Han E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[MrPresent-Han]

/run-cpu-e2e

[mergify]

@MrPresent-Han E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[MrPresent-Han]

/run-cpu-e2e

[jiaoew1991]

/lgtm
/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jiaoew1991, MrPresent-Han

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