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- Tests showed the Lists App refresh of concurrent lists on 3 tenants are:
- 1.5 mins for 3 concurrent lists refresh test (1 list refresh on each tenant);
- 2.3 mins for 10 concurrent lists refresh test (3-4 lists refresh on each tenant).
- Load test for 30 lists (10 lists per tenant) failed due to DB overload (100% of refresh transactions failed). After the test end "isRefreshing" status remained "true" for each list. It was reset manually directly through the database.
- During the 10 lists test CPU utilization reached 200% for mod-fqm-manager and 111% for mod-lists. Also, mod-permissions' CPU utilization exceeded 100% during 30 lists test.
- Maximum DB CPU utilization reached 83% (writer instance) and 99% (reader instance) during the 30 lists test. In comparison with testing with R/W split disabled, RDS CPU utilization didn't decrease when DB R/W split was enabled.
- Memory utilization for mod-permissions increased from 48% to 76% during the tests. No memory leak is suspected for all the modules.
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| Transaction | Duration, avg | Release | Tenants | Number of lists | R/W split | Other conditions |
|---|---|---|---|---|---|---|
Lists App refresh | 10 min 40 sec | [Orchid] | 1 tenant | 10 | disabled | |
| 8.5 min | [Poppy] | 1 tenant | 10 | disabled | ||
| 17.7 min | [Poppy] | 1 tenant | 10 | disabled | Testing in parallel with DI and CICO | |
| Lists App refresh current test results** | 1.5 min | [Poppy] | 3 tenants | 3 | enabled | |
| 2.3 min | [Poppy] | 3 tenants | 10 | enabled | ||
| error | [Poppy] | 3 tenants | 30 | enabled | 1 list refresh failed for the 1st tenant 8 list refreshes failed for the 3rd tenant*** |
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**Query used in lists - "Item status != Available". List refresh result is about 200K records.
***Details on the issue can be found at Failed list refresh investigation part
Instance CPU Utilization
Service CPU Utilization
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In order to investigate the issue there were conducted addtional tests for single tenant (30 lists in parallel) and multiple tenants (10 lists on each of three tenants in parallel).
| Test | Failed list refresh | |
|---|---|---|
1 tenant (30 lists in parallel) | 3 tenants (10 lists on each in parallel) | |
| 1 | 1 list | 2 lists for 1st tenant 10 lists for 3rd tenant |
| 2 | 1 list | 1 lists for 1st tenant 8 lists for 3rd tenant |
| 3 | 2 lists | 2 lists for 1st tenant 8 lists for 3rd tenant |
! For the second tenant there were no failed list refreshes during all the tests.
! After the test end "isRefreshing" status remained "true" for each of the failed lists. It was reset manually directly through the database.
Log messages during the tests:
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Infrastructure
PTF -environment pcp1
- 10 m6i.2xlarge EC2 instances located in US East (N. Virginia)us-east-1
1 database instance, writer
Name API Name Memory GIB vCPUs max_connections R6G Extra Large db.r6g.xlarge 32 GiB 4 vCPUs 2731 - MSK tenant
- 4 m5.2xlarge brokers in 2 zones
Apache Kafka version 2.8.0
EBS storage volume per broker 300 GiB
- auto.create.topics.enable=true
- log.retention.minutes=480
- default.replication.factor=3
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