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Commit9add9f9

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Don't actively violate the system limit of maximum open files (RLIMIT_NOFILE).
This avoids irritating kernel logs (if system overstep violations are enabled)and also the grsecurity alert when starting PostgreSQL.original patch by Jacek DrobieckiReferences:http://archives.postgresql.org/pgsql-bugs/2004-05/msg00103.phphttp://bugs.debian.org/cgi-bin/bugreport.cgi?bug=248967
1 parenta2e9de7 commit9add9f9

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  • src/backend/storage/file

1 file changed

+24
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‎src/backend/storage/file/fd.c‎

Lines changed: 24 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/storage/file/fd.c,v 1.147 2009/01/12 05:10:44 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/storage/file/fd.c,v 1.148 2009/03/04 09:12:49 petere Exp $
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*
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* NOTES:
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*
@@ -45,6 +45,9 @@
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#include<sys/stat.h>
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#include<unistd.h>
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#include<fcntl.h>
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#ifdefHAVE_SYS_RESOURCE_H
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#include<sys/resource.h>/* for getrlimit */
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#endif
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#include"miscadmin.h"
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#include"access/xact.h"
@@ -361,15 +364,35 @@ count_usable_fds(int max_to_probe, int *usable_fds, int *already_open)
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intused=0;
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inthighestfd=0;
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intj;
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#ifdefHAVE_GETRLIMIT
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structrlimitrlim;
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intgetrlimit_status;
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#endif
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size=1024;
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fd= (int*)palloc(size*sizeof(int));
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375+
#ifdefHAVE_GETRLIMIT
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# ifdefRLIMIT_NOFILE/* most platforms use RLIMIT_NOFILE */
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getrlimit_status=getrlimit(RLIMIT_NOFILE,&rlim);
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# else/* but BSD doesn't ... */
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getrlimit_status=getrlimit(RLIMIT_OFILE,&rlim);
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# endif/* RLIMIT_NOFILE */
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if (getrlimit_status!=0)
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ereport(WARNING, (errmsg("getrlimit failed: %m")));
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#endif/* HAVE_GETRLIMIT */
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/* dup until failure or probe limit reached */
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for (;;)
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{
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intthisfd;
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#ifdefHAVE_GETRLIMIT
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/* don't go beyond RLIMIT_NOFILE; causes irritating kernel logs on some platforms */
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if (getrlimit_status==0&&highestfd >=rlim.rlim_cur-1)
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break;
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#endif
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thisfd=dup(0);
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if (thisfd<0)
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{

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