SortEngine uses too much memory on aarch64 with pagesize=64K

[hicqu]

What did you do?

1. Create a changefeed and then pause it
2. Run 20min sysbench insert, to prepare some events
3. Resume the changefeed

What did you expect to see?

No response

What did you see instead?

• The root block is about 12GB, but TiCDC uses about 50GB exactly. I guess GC doesn't work fine.

=======================================

• The red circles indicate default TiCDC configuration;
• The green circles indicate patched TiCDC configuration without pebble block-cache.

Seems disable pebble block-cache can resolve the problem, although I don't know why.

Versions of the cluster

TiCDC version (execute cdc version):

v6.5.2

[nongfushanquan]

/severity critical