The reported statistics was not appropriate for
OSAF_CKPT_SHM_ALLOC_GUARANTEE=1,
statistics was taken accidentally with enabled TRACES for IMM , we are seeing
NORMAL performance with out any change to 5.2.RC2 code.
If OSAF_CKPT_SHM_ALLOC_GUARANTEE is set to true (export
OSAF_CKPT_SHM_ALLOC_GUARANTEE=1 & Pr-allocated )
we are seeing *NORMAL *performance with out any change to 5.2.RC2 code.
If OSAF_CKPT_SHM_ALLOC_GUARANTEE is set to false (export
OSAF_CKPT_SHM_ALLOC_GUARANTEE=0 & default )
we are seeing seeing ~70% performance degrade as expected with out any change
to 5.2.RC2 code.
Do we still need OSAF_CKPT_SHM_ALLOC_GUARANTEE=2 (Neither per-allocated nor
check if memory is available) option as default ,
but I not for it whybecause osafckptnd core dump in high memory load reported
in [#2202] .
Any how creating/pushing README.SHM explaining the above configuration options
for This #ticket
---
** [tickets:#2395] CKPT: Performance degradation ~100% (Time taken is almost
double than previous)**
**Status:** assigned
**Milestone:** 5.2.0
**Created:** Thu Mar 23, 2017 10:26 AM UTC by Chani Srivastava
**Last Updated:** Thu Apr 06, 2017 03:42 AM UTC
**Owner:** A V Mahesh (AVM)
Environment details
OS : Suse 11, 64bit Physical machine
Changeset : 8634 ( 5.2.FC)
Setup : 4 nodes
There is considerable degradation in CKPT performance in 5.2 when compared to
5.1. The times are calculated just before api and after api for which time
difference is calculated.
-> For write operations, checkpoint write api is taking 2x the time taken in
earlier release 5.1. Issue is observed in both synchronous and asynchronous
mode.
( synchronous -- Checkpoint create flags used : SA_CKPT_WR_ALL_REPLICAS
asynchronous -- Checkpoint create flag used : SA_CKPT_WR_ACTIVE_REPLICA |
SA_CKPT_CHECKPOINT_COLLOCATED ) Both local and remote replica
-> For section create operations in asynchronous mode for local replica,
checkpoint section create api is taking more than 70% the earlier value in 5.1
-> For read operations in asynchronous mode for local replica, checkpoint read
api is taking twice the time than in earlier value in 5.1
Please check the tickets pushed as part of 4.7 to 5.0, for which API
performance got affected.
---
Sent from sourceforge.net because [email protected] is
subscribed to https://sourceforge.net/p/opensaf/tickets/
To unsubscribe from further messages, a project admin can change settings at
https://sourceforge.net/p/opensaf/admin/tickets/options. Or, if this is a
mailing list, you can unsubscribe from the mailing list.
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Opensaf-tickets mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/opensaf-tickets
