rohityadavcloud commented on PR #9198:
URL: https://github.com/apache/cloudstack/pull/9198#issuecomment-2164700181
Tested this on a 4.18 and 4.19 env; with large number of simulator hosts and
networks in one env; and in case of my KVM-based homelab with MySQL 8.0.36 on
Ubuntu 22.04.
Before the change:
```
explain analyze select * from user_vm_view where id in (1,2,3,4,5);
...
| -> Nested loop left join (cost=75824 rows=305) (actual time=0.149..0.2
rows=2 loops=1)
-> Nested loop left join (cost=50766 rows=297) (actual
time=0.146..0.195 rows=2 loops=1)
-> Nested loop left join (cost=26363 rows=289) (actual
time=0.145..0.192 rows=2 loops=1)
-> Nested loop left join (cost=2597 rows=281) (actual
time=0.142..0.188 rows=2 loops=1)
-> Left hash join (autoscale_vmgroup_vm_map.instance_id =
vm_instance.id) (cost=2569 rows=281) (actual time=0.141..0.187 rows=2 loops=1)
-> Nested loop left join (cost=2243 rows=281) (actual
time=0.13..0.175 rows=2 loops=1)
-> Left hash join (affinity_group_vm_map.instance_id
= vm_instance.id) (cost=2215 rows=281) (actual time=0.129..0.174 rows=2
loops=1)
-> Nested loop left join (cost=8670 rows=281)
(actual time=0.125..0.169 rows=2 loops=1)
-> Left hash join (resource_tags.resource_id
= vm_instance.id) (cost=1607 rows=214) (actual time=0.116..0.155 rows=2
loops=1)
-> Nested loop left join (cost=17858
rows=214) (actual time=0.108..0.147 rows=2 loops=1)
-> Nested loop left join (cost=285
rows=208) (actual time=0.102..0.136 rows=2 loops=1)
-> Nested loop left join
(cost=8.34 rows=0.00322) (actual time=0.0978..0.13 rows=2 loops=1)
-> Nested loop left join
(cost=8.32 rows=0.00322) (actual time=0.0966..0.128 rows=2 loops=1)
-> Nested loop left join
(cost=8.31 rows=0.00322) (actual time=0.0928..0.124 rows=2 loops=1)
-> Nested loop left
join (cost=8.1 rows=0.0022) (actual time=0.0854..0.109 rows=2 loops=1)
-> Nested loop
left join (cost=8.08 rows=0.0022) (actual time=0.0847..0.108 rows=2 loops=1)
-> Nested
loop left join (cost=8.07 rows=0.0022) (actual time=0.084..0.107 rows=2
loops=1)
->
Nested loop left join (cost=7.85 rows=0.0022) (actual time=0.0823..0.104
rows=2 loops=1)
->
Nested loop left join (cost=7.83 rows=0.0022) (actual time=0.079..0.101 rows=2
loops=1)
-> Nested loop left join (cost=7.78 rows=0.0022) (actual time=0.0783..0.0997
rows=2 loops=1)
-> Nested loop left join (cost=7.76 rows=0.0022) (actual
time=0.0761..0.0973 rows=2 loops=1)
-> Nested loop left join (cost=7.75 rows=0.0022) (actual
time=0.073..0.0939 rows=2 loops=1)
-> Nested loop left join (cost=7.73 rows=0.0022) (actual
time=0.0699..0.0891 rows=2 loops=1)
-> Nested loop left join (cost=7.59 rows=0.0015) (actual
time=0.061..0.0765 rows=2 loops=1)
-> Nested loop left join (cost=7.58 rows=0.0015) (actual
time=0.06..0.0753 rows=2 loops=1)
-> Nested loop left join (cost=7.57 rows=0.0015)
(actual time=0.0563..0.0712 rows=2 loops=1)
-> Nested loop left join (cost=7.56 rows=0.0015)
(actual time=0.0522..0.0668 rows=2 loops=1)
-> Nested loop left join (cost=7.54
rows=0.0015) (actual time=0.0484..0.0627 rows=2 loops=1)
-> Nested loop left join (cost=7.49
rows=0.0015) (actual time=0.0476..0.0617 rows=2 loops=1)
-> Nested loop inner join (cost=7.34
rows=0.0015) (actual time=0.0459..0.0592 rows=2 loops=1)
-> Nested loop left join (cost=7.29
rows=0.0015) (actual time=0.0433..0.0552 rows=2 loops=1)
-> Nested loop left join
(cost=7.26 rows=0.0015) (actual time=0.0402..0.0492 rows=2 loops=1)
-> Nested loop left join
(cost=7.24 rows=0.0015) (actual time=0.0376..0.0463 rows=2 loops=1)
-> Nested loop inner
join (cost=7.23 rows=0.0015) (actual time=0.0356..0.0439 rows=2 loops=1)
-> Inner hash join
(vm_instance.domain_id = domain.id) (cost=7.22 rows=0.0015) (actual
time=0.0314..0.0377 rows=2 loops=1)
-> Filter:
((vm_instance.id in (1,2,3,4,5)) and (vm_instance.removed is null)) (cost=2.22
rows=0.05) (actual time=0.0152..0.0208 rows=2 loops=1)
-> Index
range scan on vm_instance using PRIMARY over (id = 1) OR (id = 2) OR (3 more)
(cost=2.22 rows=5) (actual time=0.00957..0.019 rows=5 loops=1)
-> Hash
-> Table
scan on domain (cost=0.55 rows=3) (actual time=0.00709..0.00885 rows=3 loops=1)
-> Single-row index
lookup on account using PRIMARY (id=vm_instance.account_id) (cost=0.75 rows=1)
(actual time=0.00255..0.00256 rows=1 loops=2)
-> Single-row index
lookup on guest_os using PRIMARY (id=vm_instance.guest_os_id) (cost=0.75
rows=1) (actual time=0.00103..0.00104 rows=1 loops=2)
-> Single-row index lookup
on host_pod_ref using PRIMARY (id=vm_instance.pod_id) (cost=0.75 rows=1)
(actual time=0.00129..0.00131 rows=1 loops=2)
-> Index lookup on projects
using fk_projects__project_account_id
(project_account_id=vm_instance.account_id) (cost=0.917 rows=1) (actual
time=0.0025..0.0027 rows=0.5 loops=2)
-> Single-row index lookup on
user_vm using PRIMARY (id=vm_instance.id) (cost=0.994 rows=1) (actual
time=0.00184..0.00185 rows=1 loops=2)
-> Index lookup on instance_group_vm_map
using fk_instance_group_vm_map___instance_id (instance_id=vm_instance.id)
(cost=1.67 rows=1) (actual time=0.00101..0.00101 rows=0 loops=2)
-> Single-row index lookup on instance_group
using PRIMARY (id=instance_group_vm_map.group_id) (cost=1 rows=1) (actual
time=368e-6..368e-6 rows=0 loops=2)
-> Single-row index lookup on data_center using
PRIMARY (id=vm_instance.data_center_id) (cost=0.75 rows=1) (actual
time=0.00192..0.00193 rows=1 loops=2)
-> Single-row index lookup on host using PRIMARY
(id=vm_instance.host_id) (cost=0.75 rows=1) (actual time=0.00204..0.00205
rows=1 loops=2)
-> Single-row index lookup on vm_template using PRIMARY
(id=vm_instance.vm_template_id) (cost=0.75 rows=1) (actual
time=0.00186..0.00188 rows=1 loops=2)
-> Single-row index lookup on iso using PRIMARY
(id=user_vm.iso_id) (cost=0.75 rows=1) (actual time=471e-6..471e-6 rows=0
loops=2)
-> Index lookup on volumes using i_volumes__instance_id
(instance_id=vm_instance.id) (cost=1.89 rows=1.47) (actual
time=0.00574..0.0061 rows=1 loops=2)
-> Single-row index lookup on service_offering using PRIMARY
(id=vm_instance.service_offering_id) (cost=0.511 rows=1) (actual
time=0.00224..0.00225 rows=1 loops=2)
-> Single-row covering index lookup on svc_disk_offering using PRIMARY
(id=volumes.disk_offering_id) (cost=0.538 rows=1) (actual
time=0.00154..0.00156 rows=1 loops=2)
-> Single-row index lookup on disk_offering using PRIMARY
(id=volumes.disk_offering_id) (cost=0.538 rows=1) (actual
time=0.00105..0.00106 rows=1 loops=2)
-> Single-row index lookup on backup_offering using PRIMARY
(id=vm_instance.backup_offering_id) (cost=0.682 rows=1) (actual
time=369e-6..369e-6 rows=0 loops=2)
->
Single-row index lookup on storage_pool using PRIMARY (id=volumes.pool_id)
(cost=0.538 rows=1) (actual time=0.00164..0.00165 rows=1 loops=2)
-> Index
lookup on security_group_vm_map using fk_security_group_vm_map___instance_id
(instance_id=vm_instance.id) (cost=1.45 rows=1) (actual time=983e-6..983e-6
rows=0 loops=2)
->
Single-row index lookup on security_group using PRIMARY
(id=security_group_vm_map.security_group_id) (cost=0.511 rows=1) (actual
time=326e-6..326e-6 rows=0 loops=2)
-> Single-row
index lookup on user_data using PRIMARY (id=user_vm.user_data_id) (cost=0.511
rows=1) (actual time=332e-6..332e-6 rows=0 loops=2)
-> Filter:
(nics.removed is null) (cost=1.61 rows=1.46) (actual time=0.00693..0.0074
rows=1 loops=2)
-> Index lookup
on nics using fk_nics__instance_id (instance_id=vm_instance.id) (cost=1.61
rows=1.46) (actual time=0.0065..0.00712 rows=1.5 loops=2)
-> Single-row index
lookup on networks using PRIMARY (id=nics.network_id) (cost=0.368 rows=1)
(actual time=0.00188..0.00193 rows=1 loops=2)
-> Filter: (vpc.removed is
null) (cost=0.368 rows=1) (actual time=594e-6..594e-6 rows=0 loops=2)
-> Single-row index
lookup on vpc using PRIMARY (id=networks.vpc_id) (cost=0.368 rows=1) (actual
time=502e-6..502e-6 rows=0 loops=2)
-> Index lookup on
user_ip_address using fk_user_ip_address__vm_id (vm_id=vm_instance.id)
(cost=20896 rows=64676) (actual time=0.00278..0.00278 rows=0 loops=2)
-> Index lookup on ssh_details using
i_name_vm_id (vm_id=vm_instance.id, name='SSH.KeyPairNames') (cost=0.843
rows=1.03) (actual time=0.00454..0.00517 rows=1 loops=2)
-> Hash
-> Filter:
(resource_tags.resource_type = 'UserVm') (cost=0.0742 rows=1) (actual
time=0.00231..0.00231 rows=0 loops=1)
-> Table scan on resource_tags
(cost=0.0742 rows=1) (actual time=0.00217..0.00217 rows=0 loops=1)
-> Filter: (async_job.job_status = 0)
(cost=0.329 rows=1.32) (actual time=0.00674..0.00674 rows=0 loops=2)
-> Index lookup on async_job using
i_async__instance_type_id (instance_type='VirtualMachine',
instance_id=vm_instance.id) (cost=0.329 rows=1.32) (actual
time=0.00574..0.00631 rows=1 loops=2)
-> Hash
-> Table scan on affinity_group_vm_map
(cost=0.0777 rows=1) (actual time=0.00141..0.00141 rows=0 loops=1)
-> Single-row index lookup on affinity_group using
PRIMARY (id=affinity_group_vm_map.affinity_group_id) (cost=5.33e-6 rows=1)
(actual time=379e-6..379e-6 rows=0 loops=2)
-> Hash
-> Table scan on autoscale_vmgroup_vm_map
(cost=0.0903 rows=1) (actual time=0.00626..0.00626 rows=0 loops=1)
-> Single-row index lookup on autoscale_vmgroups using
PRIMARY (id=autoscale_vmgroup_vm_map.vmgroup_id) (cost=4e-6 rows=1) (actual
time=354e-6..354e-6 rows=0 loops=2)
-> Index lookup on custom_cpu using i_name_vm_id
(vm_id=vm_instance.id, name='CpuNumber') (cost=0.843 rows=1.03) (actual
time=0.00181..0.00181 rows=0 loops=2)
-> Index lookup on custom_speed using i_name_vm_id
(vm_id=vm_instance.id, name='CpuSpeed') (cost=0.843 rows=1.03) (actual
time=0.00152..0.00152 rows=0 loops=2)
-> Index lookup on custom_ram_size using i_name_vm_id
(vm_id=vm_instance.id, name='memory') (cost=0.843 rows=1.03) (actual
time=0.00172..0.00172 rows=0 loops=2)
```
After the view/change was applied, this is the explain analyze:
```
explain analyze select * from user_vm_view where id in (1,2,3,4,5);
...
| -> Nested loop left join (cost=75824 rows=305) (actual time=0.161..0.213
rows=2 loops=1)
-> Nested loop left join (cost=50766 rows=297) (actual
time=0.158..0.208 rows=2 loops=1)
-> Nested loop left join (cost=26363 rows=289) (actual
time=0.155..0.204 rows=2 loops=1)
-> Nested loop left join (cost=2597 rows=281) (actual
time=0.153..0.2 rows=2 loops=1)
-> Left hash join (autoscale_vmgroup_vm_map.instance_id =
vm_instance.id) (cost=2569 rows=281) (actual time=0.151..0.198 rows=2 loops=1)
-> Nested loop left join (cost=2243 rows=281) (actual
time=0.14..0.186 rows=2 loops=1)
-> Left hash join (affinity_group_vm_map.instance_id
= vm_instance.id) (cost=2215 rows=281) (actual time=0.139..0.185 rows=2
loops=1)
-> Nested loop left join (cost=8670 rows=281)
(actual time=0.135..0.18 rows=2 loops=1)
-> Left hash join (resource_tags.resource_id
= vm_instance.id) (cost=1607 rows=214) (actual time=0.124..0.165 rows=2
loops=1)
-> Nested loop left join (cost=17858
rows=214) (actual time=0.118..0.158 rows=2 loops=1)
-> Nested loop left join (cost=285
rows=208) (actual time=0.112..0.148 rows=2 loops=1)
-> Nested loop left join
(cost=8.34 rows=0.00322) (actual time=0.108..0.141 rows=2 loops=1)
-> Nested loop left join
(cost=8.32 rows=0.00322) (actual time=0.107..0.14 rows=2 loops=1)
-> Nested loop left join
(cost=8.31 rows=0.00322) (actual time=0.102..0.135 rows=2 loops=1)
-> Nested loop left
join (cost=8.1 rows=0.0022) (actual time=0.0945..0.118 rows=2 loops=1)
-> Nested loop
left join (cost=8.08 rows=0.0022) (actual time=0.0934..0.117 rows=2 loops=1)
-> Nested
loop left join (cost=8.07 rows=0.0022) (actual time=0.0925..0.116 rows=2
loops=1)
->
Nested loop left join (cost=7.85 rows=0.0022) (actual time=0.0907..0.113
rows=2 loops=1)
->
Nested loop left join (cost=7.83 rows=0.0022) (actual time=0.0869..0.109
rows=2 loops=1)
-> Nested loop left join (cost=7.78 rows=0.0022) (actual time=0.086..0.108
rows=2 loops=1)
-> Nested loop left join (cost=7.76 rows=0.0022) (actual time=0.0837..0.105
rows=2 loops=1)
-> Nested loop left join (cost=7.75 rows=0.0022) (actual
time=0.0804..0.102 rows=2 loops=1)
-> Nested loop left join (cost=7.73 rows=0.0022) (actual
time=0.0771..0.0969 rows=2 loops=1)
-> Nested loop left join (cost=7.59 rows=0.0015) (actual
time=0.0686..0.0846 rows=2 loops=1)
-> Nested loop left join (cost=7.58 rows=0.0015) (actual
time=0.0674..0.0832 rows=2 loops=1)
-> Nested loop left join (cost=7.57 rows=0.0015)
(actual time=0.063..0.0784 rows=2 loops=1)
-> Nested loop left join (cost=7.56 rows=0.0015)
(actual time=0.0588..0.0739 rows=2 loops=1)
-> Nested loop left join (cost=7.54
rows=0.0015) (actual time=0.0539..0.0687 rows=2 loops=1)
-> Nested loop left join (cost=7.49
rows=0.0015) (actual time=0.0529..0.0675 rows=2 loops=1)
-> Nested loop inner join (cost=7.34
rows=0.0015) (actual time=0.0508..0.0645 rows=2 loops=1)
-> Nested loop left join (cost=7.29
rows=0.0015) (actual time=0.0473..0.0596 rows=2 loops=1)
-> Nested loop left join
(cost=7.26 rows=0.0015) (actual time=0.044..0.0536 rows=2 loops=1)
-> Nested loop left join
(cost=7.24 rows=0.0015) (actual time=0.0408..0.05 rows=2 loops=1)
-> Nested loop inner
join (cost=7.23 rows=0.0015) (actual time=0.0379..0.0467 rows=2 loops=1)
-> Inner hash join
(vm_instance.domain_id = domain.id) (cost=7.22 rows=0.0015) (actual
time=0.0333..0.04 rows=2 loops=1)
-> Filter:
((vm_instance.id in (1,2,3,4,5)) and (vm_instance.removed is null)) (cost=2.22
rows=0.05) (actual time=0.0165..0.0225 rows=2 loops=1)
-> Index
range scan on vm_instance using PRIMARY over (id = 1) OR (id = 2) OR (3 more)
(cost=2.22 rows=5) (actual time=0.0107..0.0207 rows=5 loops=1)
-> Hash
-> Table
scan on domain (cost=0.55 rows=3) (actual time=0.00857..0.0105 rows=3 loops=1)
-> Single-row index
lookup on account using PRIMARY (id=vm_instance.account_id) (cost=0.75 rows=1)
(actual time=0.00288..0.00289 rows=1 loops=2)
-> Single-row index
lookup on guest_os using PRIMARY (id=vm_instance.guest_os_id) (cost=0.75
rows=1) (actual time=0.00147..0.00149 rows=1 loops=2)
-> Single-row index lookup
on host_pod_ref using PRIMARY (id=vm_instance.pod_id) (cost=0.75 rows=1)
(actual time=0.00161..0.00163 rows=1 loops=2)
-> Index lookup on projects
using fk_projects__project_account_id
(project_account_id=vm_instance.account_id) (cost=0.917 rows=1) (actual
time=0.00257..0.00277 rows=0.5 loops=2)
-> Single-row index lookup on
user_vm using PRIMARY (id=vm_instance.id) (cost=0.994 rows=1) (actual
time=0.00227..0.00228 rows=1 loops=2)
-> Index lookup on instance_group_vm_map
using fk_instance_group_vm_map___instance_id (instance_id=vm_instance.id)
(cost=1.67 rows=1) (actual time=0.00128..0.00128 rows=0 loops=2)
-> Single-row index lookup on instance_group
using PRIMARY (id=instance_group_vm_map.group_id) (cost=1 rows=1) (actual
time=480e-6..480e-6 rows=0 loops=2)
-> Single-row index lookup on data_center using
PRIMARY (id=vm_instance.data_center_id) (cost=0.75 rows=1) (actual
time=0.00241..0.00243 rows=1 loops=2)
-> Single-row index lookup on host using PRIMARY
(id=vm_instance.host_id) (cost=0.75 rows=1) (actual time=0.0021..0.00211
rows=1 loops=2)
-> Single-row index lookup on vm_template using PRIMARY
(id=vm_instance.vm_template_id) (cost=0.75 rows=1) (actual
time=0.00223..0.00224 rows=1 loops=2)
-> Single-row index lookup on iso using PRIMARY
(id=user_vm.iso_id) (cost=0.75 rows=1) (actual time=516e-6..516e-6 rows=0
loops=2)
-> Index lookup on volumes using i_volumes__instance_id
(instance_id=vm_instance.id) (cost=1.89 rows=1.47) (actual
time=0.00561..0.00597 rows=1 loops=2)
-> Single-row index lookup on service_offering using PRIMARY
(id=vm_instance.service_offering_id) (cost=0.511 rows=1) (actual
time=0.00235..0.00236 rows=1 loops=2)
-> Single-row covering index lookup on svc_disk_offering using PRIMARY
(id=volumes.disk_offering_id) (cost=0.538 rows=1) (actual
time=0.00163..0.00164 rows=1 loops=2)
-> Single-row index lookup on disk_offering using PRIMARY
(id=volumes.disk_offering_id) (cost=0.538 rows=1) (actual
time=0.00116..0.00117 rows=1 loops=2)
-> Single-row index lookup on backup_offering using PRIMARY
(id=vm_instance.backup_offering_id) (cost=0.682 rows=1) (actual
time=448e-6..448e-6 rows=0 loops=2)
->
Single-row index lookup on storage_pool using PRIMARY (id=volumes.pool_id)
(cost=0.538 rows=1) (actual time=0.00186..0.00188 rows=1 loops=2)
-> Index
lookup on security_group_vm_map using fk_security_group_vm_map___instance_id
(instance_id=vm_instance.id) (cost=1.45 rows=1) (actual time=0.00113..0.00113
rows=0 loops=2)
->
Single-row index lookup on security_group using PRIMARY
(id=security_group_vm_map.security_group_id) (cost=0.511 rows=1) (actual
time=422e-6..422e-6 rows=0 loops=2)
-> Single-row
index lookup on user_data using PRIMARY (id=user_vm.user_data_id) (cost=0.511
rows=1) (actual time=550e-6..550e-6 rows=0 loops=2)
-> Filter:
(nics.removed is null) (cost=1.61 rows=1.46) (actual time=0.00757..0.00803
rows=1 loops=2)
-> Index lookup
on nics using fk_nics__instance_id (instance_id=vm_instance.id) (cost=1.61
rows=1.46) (actual time=0.0071..0.00775 rows=1.5 loops=2)
-> Single-row index
lookup on networks using PRIMARY (id=nics.network_id) (cost=0.368 rows=1)
(actual time=0.00215..0.00219 rows=1 loops=2)
-> Filter: (vpc.removed is
null) (cost=0.368 rows=1) (actual time=572e-6..572e-6 rows=0 loops=2)
-> Single-row index
lookup on vpc using PRIMARY (id=networks.vpc_id) (cost=0.368 rows=1) (actual
time=473e-6..473e-6 rows=0 loops=2)
-> Index lookup on
user_ip_address using fk_user_ip_address__vm_id (vm_id=vm_instance.id)
(cost=20896 rows=64676) (actual time=0.00279..0.00279 rows=0 loops=2)
-> Index lookup on ssh_details using
i_name_vm_id (vm_id=vm_instance.id, name='SSH.KeyPairNames') (cost=0.843
rows=1.03) (actual time=0.0045..0.0051 rows=1 loops=2)
-> Hash
-> Filter:
(resource_tags.resource_type = 'UserVm') (cost=0.0742 rows=1) (actual
time=0.00301..0.00301 rows=0 loops=1)
-> Table scan on resource_tags
(cost=0.0742 rows=1) (actual time=0.00283..0.00283 rows=0 loops=1)
-> Filter: (async_job.job_status = 0)
(cost=0.329 rows=1.32) (actual time=0.00744..0.00744 rows=0 loops=2)
-> Index lookup on async_job using
i_async__instance_type_id (instance_type='VirtualMachine',
instance_id=vm_instance.id) (cost=0.329 rows=1.32) (actual time=0.00641..0.007
rows=1 loops=2)
-> Hash
-> Table scan on affinity_group_vm_map
(cost=0.0777 rows=1) (actual time=0.00142..0.00142 rows=0 loops=1)
-> Single-row index lookup on affinity_group using
PRIMARY (id=affinity_group_vm_map.affinity_group_id) (cost=5.33e-6 rows=1)
(actual time=496e-6..496e-6 rows=0 loops=2)
-> Hash
-> Table scan on autoscale_vmgroup_vm_map
(cost=0.0903 rows=1) (actual time=0.00693..0.00693 rows=0 loops=1)
-> Single-row index lookup on autoscale_vmgroups using
PRIMARY (id=autoscale_vmgroup_vm_map.vmgroup_id) (cost=4e-6 rows=1) (actual
time=484e-6..484e-6 rows=0 loops=2)
-> Index lookup on custom_cpu using i_name_vm_id
(vm_id=vm_instance.id, name='CpuNumber') (cost=0.843 rows=1.03) (actual
time=0.00205..0.00205 rows=0 loops=2)
-> Index lookup on custom_speed using i_name_vm_id
(vm_id=vm_instance.id, name='CpuSpeed') (cost=0.843 rows=1.03) (actual
time=0.00172..0.00172 rows=0 loops=2)
-> Index lookup on custom_ram_size using i_name_vm_id
(vm_id=vm_instance.id, name='memory') (cost=0.843 rows=1.03) (actual
time=0.00216..0.00216 rows=0 loops=2)
```
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