FAQs
How secure is Cloud Memory Memcache?
Access safety
Cloud Memory Memcache is “isolated by account and only accessed via the internal network”, thus only cloud hosts from the same account can access instances.
What protocols does Cloud Memory Memcache support? Are they native protocols?
The standalone Memcache supports all Memcache protocols.
Are the Cloud Memory Memcached operations atomic?
The standalone Memcache supports
Does Cloud Memory Memcached support the binary protocol?
Supports
What is the QPS limit of distributed Memcache?
For every 1G capacity of Cloud Memory Memcache, the maximum QPS is 4000. If exceeded, there will be read-write failures.
What do the monitoring items of standalone memcache mean?
| Monitoring Item | Meaning |
|---|---|
| Memory Used (KB) | The actual physical memory occupied by the memcache process, in KB |
| Memory Usage Ratio (%) | The ratio of memory used to the purchased capacity |
| Current Connection Count | The number of client connections to memcache, collected once a minute |
| QPS (times/s) | The number of all command operations per second, collected once a minute and the average for one minute is taken (less than 60 in a minute, then 0) |
| Total Key Count | Record count |
| Input Traffic (Bps) | The data flow received by Memcache, collected once a minute |
| Output Traffic (Bps) | The data flow sent by Memcache, collected once a minute |
| Set QPS (times/s) | The number of set command operations per second, collected once a minute and the average for one minute is taken (less than 60 in a minute, then 0) |
| Set Operation Count | The number of set command operations in five minutes |
| Get QPS (times/s) | The number of get command operations per second, collected once a minute and the average for one minute is taken (less than 60 in a minute, then 0) |
| Get Operation Count | The number of get command operations in five minutes |
| Get Hit Rate (%) | The ratio of hits to get operations, collected once a minute, the maximum value within five minutes is taken |
| Delete Operation Count | The number of delete command operations in five minutes |
| Incr Operation Count | The number of incr command operations in five minutes |
| Decr Operation Count | The number of decr command operations in five minutes |
| Touch Operation Count | The number of touch command operations in five minutes |
| CAS Operation Count | The number of cas command operations in five minutes |
Does the worker thread of standalone Memcache have anything to do with the capacity?
The worker thread of standalone Memcache is related to capacity:
1,2G ==》 1 worker thread
4G ==》 2 worker threads
8,16G ==》 4 worker threads
What is the maximum number of connections for a new standalone Memcache?
Instance Capacity <2G Maximum Connection Number 5000
Instance Capacity>=2~4G Maximum Connection Number 10000
Instance Capacity>=4G Maximum Connection Number 20000
Instance Capacity>=8G Maximum Connection Number 40000
Instance Capacity>=16G Maximum Connection Number 80000
How’s the performance of standalone Memcache?
Use the tool memtier_benchmark, based on 32-byte data pressure testing get command, the QPS result is as follows:
| Memory Size | QPS |
|---|---|
| 1G | 10W |
| 2G | 12W |
| 4G | 20W |
| 8G | 23W |
| 16G | 26W |
How’s the concurrency performance of short connections of standalone Memcache ?
Use the tool memtier_benchmark, based on 32-byte data pressure testing get command, the QPS result is as follows:
| Memory Size | QPS |
|---|---|
| 1G | 2W |
| 2G | 3W |
| 4G | 4.5W |
| 8G | 5W |
| 16G | 5W |