On 19.2.2011 г. 16:43 ч., Jonathan Ellis wrote:
Flush code didn't change between 0.7.0 and 0.7.2. There must be some
other variable here. Memory pressure maybe?
Cloud you please elaborate on that one ?
The conditions are exactly the same for the test with 0.7.0 and 0.7.2.
By the way, 0.7.1 tests are similar to 0.7.2, while 0.7 early betas to
0.7.0 is fine.
Ivan
On 19.2.2011 г. 16:43 ч., Jonathan Ellis wrote:
Flush code didn't change between 0.7.0 and 0.7.2. There must be some
other variable here. Memory pressure maybe?
On Sat, Feb 19, 2011 at 8:16 AM, Ivan Georgiev<yngw...@bk.ru> wrote:
Hi,
I am testing 0.7.2 on a Windows 2003 x64 system(one node) and I am having
the following problem.
My insertion speed is relatively slow, so the memtables do not get full and
the actual flushing is triggered by memtable_flush_after_mins, this happens
on the hour mark. My problem with 0.7.2 is that when that happens, the cpu
spikes to 25% overall usage (x4 Xeon) and the operation takes anywhere from
2 to 4 minutes, leaving the node not responding during that time. This has
forced to me to increase the rpc timeout option to beyond what i feel
comfortable with.
I have run multiple tests with 0.7.0 and 0.7.2 with the same dataset and the
results are consistent. During the same operation 0.7.0 takes about 10
seconds to complete vs. 2 to 4 minutes for 0.7.2. I am attaching a log with
the timestamps from one such flushing of 0.7.2. Please let me know if there
is anything i can do to speed up and get results similar to 0.7.0.
Regards:
Ivan
This is the log of the operations which took most time during the flush
operation. Using 0.7.0, with the same number of operations the flushing
takes less than 10 seconds.
INFO 01:36:44,906 Enqueuing flush of
Memtable-ArchiveFiles.6f776e65724944@1225856921(1619949 bytes, 34467
operations)
INFO 01:37:47,375 Completed flushing
C:\Storage\data\Storage\ArchiveFiles.68617368-f-3-Data.db (5549187 bytes)
INFO 01:37:47,375 Writing Memtable-ArchiveFiles.6e616d65@978152661(1619949
bytes, 34467 operations)
INFO 01:37:47,375 Enqueuing flush of
Memtable-ArchiveFiles.706172656e74466f6c6465724944@2097700961(1619949 bytes,
34467 operations)
INFO 01:38:51,343 Completed flushing
C:\Storage\data\Storage\ArchiveFiles.6e616d65-f-3-Data.db (3820265 bytes)
INFO 01:38:51,343 Writing
Memtable-ArchiveFiles.6f776e65724944@1225856921(1619949 bytes, 34467
operations)
