Informix - Problem description
Problem IT32067 | Status: Closed |
RA_Q_LIST MUTEX CONTENTION AND HOT READAHEAD SPIN LOCK WHEN THERE ARE MANY READAHEAD THREADS | |
product: | |
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10 | |
Problem description: | |
With more readahead threads being spawned, there's a chance for seeing mutex waiting on RA_Q_List mutex (onstat -g ath, -g lmx, -g wmx) as well as hightened spin-locking activity on "cond lock, name = ReadAhead" spin lock (onstat -g spi). As a result, you'd see increased cpu consumption and also queries (submiting RA requests) being slowed down. | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC15 and 14.10.xC5. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Informix Server 12.10.xC15 or 14.10.xC5. * **************************************************************** | |
Local Fix: | |
Solution | |
Workaround | |
**************************************************************** * USERS AFFECTED: * * Users of Informix Server prior to 12.10.xC15 and 14.10.xC5. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to Informix Server 12.10.xC15 or 14.10.xC5. * **************************************************************** | |
Comment | |
Fixed in Informix Server 12.10.xC15 and 14.10.xC5. | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 04.03.2020 04.12.2020 04.12.2020 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |