<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial">Hi all：<div>I have reported a bug about time consuming of “resource-list<span style="line-height: 1.7;">†in ceilometer CLI：</span></div><div><a href="https://bugs.launchpad.net/ceilometer/+bug/1264434">https://bugs.launchpad.net/ceilometer/+bug/1264434</a></div><div><br></div><div>In order to <span style="line-height: 1.7;">Identify the causes of this </span>phenomenon, <span style="line-height: 1.7;">I have pdb the codes in my invironment(configured mysql as </span><span style="line-height: 1.7;">db driver</span><span style="line-height: 1.7;">):</span></div><div><span style="line-height: 1.7;">the most import part of process</span> of listing resource is implemented in following codes:</div><div><br></div><div>code of get_resources() in /ceilometer/storage/impl_sqlalchemy.py：</div><div>…………</div><div><div style="line-height: 1.7;"> for meter, first_ts, last_ts in <span style="color: rgb(255, 0, 0);">query.all()</span>:</div><div style="line-height: 1.7;"> yield api_models.Resource(</div><div style="line-height: 1.7;"> resource_id=meter.resource_id,</div><div style="line-height: 1.7;"> project_id=meter.project_id,</div><div style="line-height: 1.7;"> first_sample_timestamp=first_ts,</div><div style="line-height: 1.7;"> last_sample_timestamp=last_ts,</div><div style="line-height: 1.7;"> source=meter.sources[0].id,</div><div style="line-height: 1.7;"> user_id=meter.user_id,</div><div style="line-height: 1.7;"> metadata=meter.resource_metadata,<span style="color: rgb(0, 0, 0);"></span></div><div style="line-height: 1.7;"> meter=[</div><div style="line-height: 1.7;"> api_models.ResourceMeter(</div><div style="line-height: 1.7;"> counter_name=m.counter_name,</div><div style="line-height: 1.7;"> counter_type=m.counter_type,</div><div style="line-height: 1.7;"> counter_unit=m.counter_unit,</div><div style="line-height: 1.7;"> )</div><div style="line-height: 1.7;"> <span style="color: rgb(255, 0, 0);">for m in meter.resource.meters</span></div><div style="line-height: 1.7;"> ],</div><div style="line-height: 1.7;"> )</div><div style="line-height: 1.7;">The method generate iterator of object of <span style="line-height: 1.7;"> </span><span style="line-height: 1.7;">api_models.Resource for ceilometer API to show.</span></div><div><span style="line-height: 1.7;">1.The operation “</span><span style="line-height: 1.7; color: rgb(0, 0, 0);">query.all()</span><span style="line-height: 1.7;">†will query the DB table “meter†with the expression </span>generated forward<span style="line-height: 1.7;">,</span><span style="line-height: 1.7;">in my </span><span style="line-height: 1.7;">invironment the </span><span style="line-height: 1.7;">DB table “meter†have more than 300000 items, so this operation may consume about 30 seconds;</span></div><div><span style="line-height: 1.7;">2.The </span><span style="line-height: 1.7;">operation</span><span style="line-height: 1.7;"> </span><span style="line-height: 1.7;"> </span><span style="line-height: 1.7;">"</span><span style="line-height: 1.7;">for m in meter.resource.meters</span><span style="line-height: 1.7;">" will </span><span style="line-height: 1.7;">circulate the meters of this resource . a resource of server </span><span style="line-height: 1.7;">may have more than 100000 meter iterms in my </span><span style="line-height: 1.7;">invironment. So the time of whole process is too long. I think the </span><span style="line-height: 1.7;">meter of </span><span style="line-height: 1.7;">Resource object can be reduced and I have tested this </span>modification, it is OK for listing resource,and reduce the most time consumption</div></div><div><br></div><div>I have noticed that there are many methods of db operation may <span style="line-height: 1.7;">time consumption. </span></div><div><br></div><div><span style="line-height: 1.7;">ps: I have configured the ceilometer pulling interval from 600s to 60s in </span>/etc/ceilometer/pipeline.yaml, but the invironment <span style="line-height: 1.7;">has just run 10 days!</span></div><div><br></div><div>I'm a beginner of ceilometer,and want to fix this bug,but I haven't found a suitable way</div><div><span style="font-family: Helvetica, 'Microsoft Yahei', verdana; line-height: 1.7;">may be someone can help me with this?</span></div><div><br></div><div style="line-height: 1.7;"><span style="font-family: Helvetica, 'Microsoft Yahei', verdana;">Best Regards</span></div><div style="line-height: 1.7;"><span style="font-family: Helvetica, 'Microsoft Yahei', verdana;">liusheng</span></div><div><br></div></div>