I am not sure about the tombstone_failure_threshold, but the tombstones will
only get removed during compaction if they are older than GC_Grace_Seconds for
that CF. How old are these tombstones?
Rahul
> On Jan 12, 2015, at 11:27 PM, Xu Zhongxing <xu_zhong_x...@163.com> wrote:
>
> Hi,
>
> When I connect to C* with driver, I found some warnings in the log (I
> increased tombstone_failure_threshold to 150000 to see the warning)
>
> WARN [ReadStage:5] 2015-01-13 12:21:14,595 SliceQueryFilter.java (line 225)
> Read 34188 live and 104186 tombstoned cells in system.schema_columns (see
> tombstone_warn_threshold). 2147483387 columns was requested, slices=[-],
> delInfo={deletedAt=-9223372036854775808, localDeletion=2147483647}
> WARN [ReadStage:5] 2015-01-13 12:21:15,562 SliceQueryFilter.java (line 225)
> Read 34209 live and 104247 tombstoned cells in system.schema_columns (see
> tombstone_warn_threshold). 2147449199 columns was requested, slices=[-],
> delInfo={deletedAt=-9223372036854775808, localDeletion=2147483647}
>
> I run the command:
> nodetool compact system
>
> But the tombstone number does not decrease. I still see the warnings with the
> exact number of tombstones.
> Why is this happening? What should I do to remove the tombstones in the
> system keyspace?
