hset can not update value, sometimes

[reboomc]

version: 2.8.8
client: redis-cli
os: ubuntu 12.04 server lts

memory status:

total used free shared buffers cached
Mem: 1978 1372 606 0 221 484
-/+ buffers/cache: 666 1312
Swap: 4375 0 4375

recent log:

[7761] 08 Aug 12:50:44.072 * RDB: 0 MB of memory used by copy-on-write
[3081] 08 Aug 12:50:44.127 * Background saving terminated with success
[3081] 08 Aug 12:55:45.060 * 10 changes in 300 seconds. Saving...
[3081] 08 Aug 12:55:45.060 * Background saving started by pid 7797
[7797] 08 Aug 12:55:45.113 * DB saved on disk
[7797] 08 Aug 12:55:45.113 * RDB: 0 MB of memory used by copy-on-write
[3081] 08 Aug 12:55:45.160 * Background saving terminated with success
[3081] 08 Aug 13:03:02.193 * 10 changes in 300 seconds. Saving...
[3081] 08 Aug 13:03:02.193 * Background saving started by pid 7806
[7806] 08 Aug 13:03:02.268 * DB saved on disk
[7806] 08 Aug 13:03:02.268 * RDB: 0 MB of memory used by copy-on-write
[3081] 08 Aug 13:03:02.293 * Background saving terminated with success

[badboy]

Can you describe your problem a little bit more? It's not clear what happens and what should happen. The log says nothing and the memory usage looks normal too

[reboomc]

@badboy

Thanks for your reply.
my scenario looks like:

HGET name key
old value

and i need update the "old value" to "new value"

HSET name key new_value
0

however HSET executed:

HGET name key
old value

still "old value"

Thanks.

[badboy]

Both HSET and HGET on the same server?

[reboomc]

@badboy

yes, the same server