mirror of https://github.com/postgres/postgres
52 lines
1.3 KiB
Perl
52 lines
1.3 KiB
Perl
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#!/usr/bin/perl
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# Notes ... -B 1 == 8k
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if(@ARGV > 1) {
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if($ARGV[0] eq "-B") {
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$buffers = $ARGV[1];
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}
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}
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if($buffers > 0) {
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$kb_memory_required = $buffers * 8;
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}
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$shm = `sysctl kern.ipc | grep shmall`;
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( $junk, $shm_amt ) = split(/ /, $shm);
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chomp($shm_amt);
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$sem = `sysctl kern.ipc | grep semmap`;
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print "\n\n";
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if(length($shm) > 0) {
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printf "shared memory enabled: %d kB available\n", $shm_amt * 4;
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if($buffers > 0) {
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if($kb_memory_required / 4 > $shm_amt) {
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print "\n";
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print "to provide enough shared memory for a \"-B $buffers\" setting\n";
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print "issue the following command\n\n";
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printf "\tsysctl -w kern.ipc.shmall=%d\n", $kb_memory_required / 4;
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print "\nand add the following to your /etc/sysctl.conf file:\n\n";
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printf "\tkern.ipc.shmall=%d\n", $kb_memory_required / 4;
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} else {
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print "\n";
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print "no changes to kernel required for a \"-B $buffers\" setting\n";
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}
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}
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} else {
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print "no shared memory support available\n";
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print "add the following option to your kernel config:\n\n";
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print "\toptions SYSVSHM\n\n";
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}
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print "\n==========================\n\n";
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if(length($sem) > 0) {
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print "semaphores enabled\n";
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} else {
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print "no semaphore support available\n";
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print "add the following option to your kernel config:\n\n";
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print "\toptions SYSVSEM\n\n";
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}
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