Red Hat Bugzilla – Bug 507159
Cannot increase open file limit greater then 1024 * 1024 (1048576)
Last modified: 2010-04-01 04:56:27 EDT
Description of problem: Can not increase open file limit more then 1048576
Steps to Reproduce:
1. #ulimit -n 1048577
-bash: ulimit: open files: cannot modify limit: Operation not permitted
Additional info: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9cfe015aa424b3c003baba3841a60dd9b5ad319b
Is this an actual issue in production on a RHEL system for you?
Yes, system is in production. We are using a server as domain manager, this server has currently ~50k domains, as more domains comes in Apache will start reporting errors. We are close to this limit of 1048576. Server hardware has enough power to handle 200K domains, this is the only bottleneck.
Motherboard: SuperMicro X7QCE Intel Xeon HexCore QuadProc Sata
Processor: 4 * Intel Xeon-Dunnington 7450-HexCore [2.4GHz]
Hard Drive: 6 * Seagate Cheetah ST3300655SS (RAID 10)
Drive Controller: LSI LOGIC \ 8308ELP \ SAS RAID
The upstream patch is pretty straightforward.
Giving this to Eric for 5.5.
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
You can download this test kernel from http://people.redhat.com/dzickus/el5
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