Best posts made by Andreas | XCP-ng and XO forum

Andreas

Static: 512 MiB/32 GiB
Dynamic: 32 GiB/32 GiB

could not change static value

okay did a migration again
but unfortunately the same result

Before migration

#redis-benchmark -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
SET: 223363.84 requests per second
GET: 235793.44 requests per second
LPUSH: 247954.38 requests per second
LPOP: 251572.33 requests per second

After migration

#redis-benchmark -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
SET: 111844.31 requests per second
GET: 118119.54 requests per second
LPUSH: 116083.34 requests per second
LPOP: 116795.14 requests per second

After reboot off VM on the second server

#redis-benchmark -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
SET: 244468.91 requests per second
GET: 254647.31 requests per second
LPUSH: 261848.66 requests per second
LPOP: 261574.69 requests per second

Andreas

Run latest xcp-ng 8.2
Memory half as fast after migration of vm.

Have 3 exactly the same servers.
I have a VM web server that uses redis
and if i run a memory test and then migrate the VM to another server, it's half as fast.
if I migrate back to the same server, it's still half as fast.
but if I restart the VM, the speed is as it should be again.

See speed test below

#redis-benchmark -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
SET: 227401.94 requests per second
GET: 258431.33 requests per second
LPUSH: 254291.17 requests per second
LPOP: 263192.53 requests per second

after migrating to another server

#redis-benchmark -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
SET: 100065.05 requests per second
GET: 111944.48 requests per second
LPUSH: 114129.20 requests per second
LPOP: 112549.23 requests per second

after migrating to the first server and restarting the vm

#redis-benchmark -r 1000000 -n 2000000 -t get,set,lpush,lpop -P 16 -q
SET: 218245.31 requests per second
GET: 239721.91 requests per second
LPUSH: 261643.11 requests per second
LPOP: 261506.28 requests per second

Wonder if anyone else has had this problem and knows the cause or has a solution.

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