Hi Bhathiya, What Paul was referring to is Latency View MBean and its implementation can be found at https://svn.wso2.org/repos/wso2/carbon/platform/trunk/dependencies/synapse/2.1.1-wso2v3/modules/transports/core/nhttp/src/main/java/org/apache/synapse/transport/nhttp/util/LatencyView.java
On Fri, May 10, 2013 at 1:23 PM, Paul Fremantle <[email protected]> wrote: > Hmmm neither of these is perfect. In a server running for 10 months, the > average isn't very useful since server start. Ideally we would like the > Cassandra MBeans to collect the same that we do for NHTTP etc, e.g. last > minute, 5m, 15m, 1h, 4h, 8h, 24h, etc. (or something like that - can't > exactly remember!) > > Paul > > > On 10 May 2013 07:54, Bhathiya Jayasekara <[email protected]> wrote: > >> Hi Paul, >> >> I had a little research on availability of latency statistics. There are >> 2 types of latency values which can be retrieved from Cassandra jmx mbeans. >> >> 1) Read/write latency for keyspaces >> 2) Read/write latency for column families >> >> The first one is calculated by (total time spent for requests *since >> server started*)/(number of requests *since server started*), >> >> and the second one is calculated by (total time spent for requests *since >> last call to jmx mbean*)/(number of requests *since last call to jmx >> mbean*). >> >> So, to have an average value for latency, it seems the first one is more >> suitable. So I'm going to use those values as latency. Since I have >> read/write counts as well, average latency for whole system can be >> calculated. >> >> Thanks. >> >> >> >> On Thu, May 9, 2013 at 3:52 PM, Paul Fremantle <[email protected]> wrote: >> >>> Very nice. Is there any way we can get average ms per read and write? I >>> know that is important to many users. >>> >>> Paul >>> >>> >>> On 9 May 2013 11:07, Bhathiya Jayasekara <[email protected]> wrote: >>> >>>> Hi Prabath, >>>> >>>> As you suggested, I wrote a simple table gadget to show other relevant >>>> statistics too. Comments are welcome. >>>> >>>> I'm attaching screenshots of the gadgets herewith. >>>> >>>> Thanks. >>>> >>>> >>>> On Thu, May 9, 2013 at 11:22 AM, Prabath Abeysekera >>>> <[email protected]>wrote: >>>> >>>>> Hi Bhathiya, >>>>> >>>>> On Thu, May 9, 2013 at 10:10 AM, Bhathiya Jayasekara < >>>>> [email protected]> wrote: >>>>> >>>>>> Hi devs, >>>>>> >>>>>> I started working on [1] few weeks back. The initial milestone is to >>>>>> implement Cassandra data publishing, analyzing and monitoring part. The >>>>>> billing task will be done later. Currently I have completed Cassandra >>>>>> disk >>>>>> space usage and node status monitoring implementation. So with this now, >>>>>> Cassandra disk space usages can be monitored in different time periods >>>>>> such >>>>>> as "in last hour", "in last day", "in last week" and in "last month". >>>>>> >>>>>> In addition to disk space usage, other statistics such as >>>>>> sstablecount, read and write counts etc. are also published and analyzed >>>>>> now, and can be added to monitoring dashboard if required. (Need to write >>>>>> gadgets accordingly) >>>>>> >>>>> >>>>> Good work. Please attach a few screenshots of the available dashboard >>>>> artifacts you've come up with too. Also, I believe, if possible, writing a >>>>> few other gadgets to display the information on read/write counts, >>>>> latency, sstablecounts, etc too would be helpful to make it a more >>>>> complete >>>>> toolbox. (Referring your mail, I hope it's going to be straightforward as >>>>> the necessary information is already available.) >>>>> >>>>> >>>>>> >>>>>> Currently data publishing and viewing is available for super tenant >>>>>> only, and I'm planning to extend it to tenant level. >>>>>> >>>>>> [1] https://redmine.wso2.com/issues/1163 >>>>>> >>>>>> >>>>>> Thanks. >>>>>> >>>>>> -- >>>>>> *Bhathiya Jayasekara* >>>>>> *Software Engineer,* >>>>>> *WSO2 inc., http://wso2.com* >>>>>> * >>>>>> * >>>>>> *Phone: +94715478185* >>>>>> *LinkedIn: http://www.linkedin.com/in/bhathiyaj* >>>>>> *Twitter: https://twitter.com/bhathiyax* >>>>>> >>>>>> _______________________________________________ >>>>>> Dev mailing list >>>>>> [email protected] >>>>>> http://wso2.org/cgi-bin/mailman/listinfo/dev >>>>>> >>>>>> >>>>> >>>>> Regards, >>>>> Prabath >>>>> -- >>>>> Prabath Abeysekara >>>>> Email: [email protected] <[email protected]> >>>>> Mobile: +94774171471 >>>>> >>>>> <http://harshana05.blogspot.com/> >>>>> >>>> >>>> >>>> >>>> -- >>>> *Bhathiya Jayasekara* >>>> *Software Engineer,* >>>> *WSO2 inc., http://wso2.com* >>>> * >>>> * >>>> *Phone: +94715478185* >>>> *LinkedIn: http://www.linkedin.com/in/bhathiyaj* >>>> *Twitter: https://twitter.com/bhathiyax* >>>> >>>> _______________________________________________ >>>> Dev mailing list >>>> [email protected] >>>> http://wso2.org/cgi-bin/mailman/listinfo/dev >>>> >>>> >>> >>> >>> -- >>> Paul Fremantle >>> CTO and Co-Founder, WSO2 >>> OASIS WS-RX TC Co-chair, VP, Apache Synapse >>> >>> UK: +44 207 096 0336 >>> US: +1 646 595 7614 >>> >>> blog: http://pzf.fremantle.org >>> twitter.com/pzfreo >>> [email protected] >>> >>> wso2.com Lean Enterprise Middleware >>> >>> Disclaimer: This communication may contain privileged or other >>> confidential information and is intended exclusively for the addressee/s. >>> If you are not the intended recipient/s, or believe that you may have >>> received this communication in error, please reply to the sender indicating >>> that fact and delete the copy you received and in addition, you should not >>> print, copy, retransmit, disseminate, or otherwise use the information >>> contained in this communication. Internet communications cannot be >>> guaranteed to be timely, secure, error or virus-free. The sender does not >>> accept liability for any errors or omissions. >>> >> >> >> >> -- >> *Bhathiya Jayasekara* >> *Software Engineer,* >> *WSO2 inc., http://wso2.com* >> * >> * >> *Phone: +94715478185* >> *LinkedIn: http://www.linkedin.com/in/bhathiyaj* >> *Twitter: https://twitter.com/bhathiyax* >> > > > > -- > Paul Fremantle > CTO and Co-Founder, WSO2 > OASIS WS-RX TC Co-chair, VP, Apache Synapse > > UK: +44 207 096 0336 > US: +1 646 595 7614 > > blog: http://pzf.fremantle.org > twitter.com/pzfreo > [email protected] > > wso2.com Lean Enterprise Middleware > > Disclaimer: This communication may contain privileged or other > confidential information and is intended exclusively for the addressee/s. > If you are not the intended recipient/s, or believe that you may have > received this communication in error, please reply to the sender indicating > that fact and delete the copy you received and in addition, you should not > print, copy, retransmit, disseminate, or otherwise use the information > contained in this communication. Internet communications cannot be > guaranteed to be timely, secure, error or virus-free. The sender does not > accept liability for any errors or omissions. > > _______________________________________________ > Dev mailing list > [email protected] > http://wso2.org/cgi-bin/mailman/listinfo/dev > > -- Thanks & regards, Nirmal Software Engineer- Platform Technologies Team, WSO2 Inc. Mobile: +94715779733 Blog: http://nirmalfdo.blogspot.com/
_______________________________________________ Dev mailing list [email protected] http://wso2.org/cgi-bin/mailman/listinfo/dev
