I returned to periodic commit log fsync.
Jonathan Shook gmail.com> writes:
>
> Would you share with us the changes you made, or problems you found?
>
Would you share with us the changes you made, or problems you found?
On Wed, Jan 26, 2011 at 10:41 AM, Oleg Proudnikov wrote:
> Hi All,
>
> I was able to run contrib/stress at a very impressive throughput. Single
> threaded client was able to pump 2,000 inserts per second with 0.4 ms latency.
> M
Hi All,
I was able to run contrib/stress at a very impressive throughput. Single
threaded client was able to pump 2,000 inserts per second with 0.4 ms latency.
Multithreaded client was able to pump 7,000 inserts per second with 7ms latency.
Thank you very much for your help!
Oleg
Look at iostat -x 10 10 when he active par tof your test is running. there
should be something called svc_t - that should be in the 10ms range, and
await should be low.
Will tell you if IO is slow, or if IO is not being issued.
Also, ensure that you ain't swapping with something like "swapon -s"
buddhasystem bnl.gov> writes:
>
>
> Oleg,
>
> I'm a novice at this, but for what it's worth I can't imagine you can have a
> _sustained_ 1kHz insertion rate on a single machine which also does some
> reads. If I'm wrong, I'll be glad to learn that I was. It just doesn't seem
> to square with a
Brandon Williams gmail.com> writes:
>
> On Tue, Jan 25, 2011 at 1:23 PM, Oleg Proudnikov cloudorange.com>
wrote:
>
> When I run contrib/stress with a higher thread count, the server does scale to
> 200 inserts a second with latency of 200ms. At the same time Windows desktop
> scales to 900 ins
On Tue, Jan 25, 2011 at 1:23 PM, Oleg Proudnikov wrote:
> When I run contrib/stress with a higher thread count, the server does scale
> to
> 200 inserts a second with latency of 200ms. At the same time Windows
> desktop
> scales to 900 inserts a second and latency of 120ms. There is a huge
> diffe
k time on a hard drive.
Maxim
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Tyler Hobbs riptano.com> writes:
> Try using something higher than -t 1, like -t 100.- Tyler
>
Thank you, Tyler!
When I run contrib/stress with a higher thread count, the server does scale to
200 inserts a second with latency of 200ms. At the same time Windows desktop
scales to 900 inserts a s
Try using something higher than -t 1, like -t 100.
- Tyler
On Mon, Jan 24, 2011 at 9:38 PM, Oleg Proudnikov wrote:
> Hi All,
>
> I am struggling to make sense of a simple stress test I ran against the
> latest
> Cassandra 0.7. My server performs very poorly compared to a desktop and
> even a
> n
Hi All,
I am struggling to make sense of a simple stress test I ran against the latest
Cassandra 0.7. My server performs very poorly compared to a desktop and even a
notebook.
Here is the command I execute - a single threaded insert that runs on the same
host as Cassnadra does (I am using new con
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