pebble batch no sync fix

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #1695 (b720731) into master (7a40e34) will increase coverage by 0.01%.
Report is 14 commits behind head on master.
The diff coverage is 18.91%.

❗ Current head b720731 differs from pull request most recent head e935790. Consider uploading reports for the commit e935790 to get more accurate results

@@            Coverage Diff             @@
##           master    #1695      +/-   ##
==========================================
+ Coverage   52.58%   52.59%   +0.01%     
==========================================
  Files         481      481              
  Lines       60275    60295      +20     
==========================================
+ Hits        31693    31715      +22     
- Misses      26166    26167       +1     
+ Partials     2416     2413       -3     

Files Changed	Coverage Δ
core/rawdb/database.go	9.49% <0.00%> (ø)
core/rawdb/databases_64bit.go	0.00% <0.00%> (ø)
core/rawdb/schema.go	26.31% <0.00%> (-3.10%)	⬇️
ctxcdb/pebble/pebble.go	38.46% <16.66%> (-0.15%)	⬇️
rlp/decode.go	90.07% <35.71%> (-1.06%)	⬇️
crypto/bn256/cloudflare/optate.go	100.00% <100.00%> (ø)

... and 14 files with indirect coverage changes