The attachment is result of grep -i GC /usr/local/cassandra/system.log > gc.log
On Tue, Jan 12, 2016 at 1:12 PM, Shuo Chen <chenatu2...@gmail.com> wrote:
> I have a assumption that, lots of pending compaction tasks jam the memory
> and raise full gc. The full chokes the process and slows down compaction.
> And this causes more pending compaction tasks and more pressure on memory.
>
> Is there a method to list the concrete details of pending compaction tasks?
>
> On Tue, Jan 12, 2016 at 11:41 AM, Robert Coli <rc...@eventbrite.com>
> wrote:
>
>> The lines you are looking for look like this :
>>
>> INFO [CompactionExecutor:48] 2016-01-12 09:07:59,995 CompactionTask.java
>> (line 120) Compacting
>> [SSTableReader(path='/usr/local/cassandra/data/system/sstable_activity/system-sstable_activity-jb-4959-Data.db'),
>> SSTableReader(path='/usr/local/cassandra/data/system/sstable_activity/system-sstable_activity-jb-4960-Data.db'),
>> SSTableReader(path='/usr/local/cassandra/data/system/sstable_activity/system-sstable_activity-jb-4961-Data.db'),
>> SSTableReader(path='/usr/local/cassandra/data/system/sstable_activity/system-sstable_activity-jb-4962-Data.db')]
>>
>> and
>>
>> INFO [CompactionExecutor:47] 2016-01-12 04:06:43,946 CompactionTask.java
>> (line 299) Compacted 4 sstables to
>> [/usr/local/cassandra/data/system/compaction_history/system-compaction_history-jb-3532,].
>> 14,413 bytes to 13,334 (~92% of original) in 52,135ms = 0.000244MB/s. 156
>> total partitions merged to 149. Partition merge counts were {1:156, }
>>
>> There are only 4 of the compaction completed messages in the log you
>> attached, tiny ones.
>>
>> The log doesn't look like much compaction is occurring?
>>
>> =Rob
>>
>>
>
>
> --
> *陈硕* *Shuo Chen*
> chenatu2...@gmail.com
> chens...@whaty.com
>
--
*陈硕* *Shuo Chen*
chenatu2...@gmail.com
chens...@whaty.com
gc.log
Description: Binary data
