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Problem IT35218
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Status: Closed |
SEARCH OF SDS PAGING FILE IS INEFFICIENT FOR LARGE FILE SIZES
|
| product: |
INFORMIX SERVER / 5725A3900 / E10 - |
| Problem description: |
When the size of a paging file on an SDS server becomes large
(millions of pages) more time is consumed by threads as the file
is searched. Such threads may be observed to be in a running
state for extended periods of time as they search the page file
or wait to acquire the spin lock to start the search. Using the
onmode -X stack command or an OS command to capture the stack of
the running thread may show:
sdcloneFindPage_Int
sdcloneFindPage
chunkio_sdCloneRead
chunkio
physio
ra_submit_ios
ra_do_pagelist_req
readahead_daemon
th_init_initgls
startup
The above stack is an example from a readahead thread. Stacks
from other threads are also possible and all will have the
function sdcloneFindPage_Int in common near to the top of the
stack. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server prior to 14.10.xC6. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Informix Server 14.10.xC6 (when available). *
**************************************************************** |
| Local Fix: |
|
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server prior to 14.10.xC6. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Informix Server 14.10.xC6 (when available). *
**************************************************************** |
| Comment |
Fixed in Informix Server 14.10.xC6. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 09.12.2020
11.05.2021
11.05.2021 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
