setParameter Command

Setting Runtime Parameters

This command allows changes to be made at runtime for some internal options as well some of the Command Line Parameters.

This command was added in 1.8 but some of the options have changed since then. Please pay attention to the version when they were made available.

> db.adminCommand({setParameter:1, option1:true, ...})
// real example to increase logging
> db.adminCommand({setParameter:1, logLevel:4})

//disallow table/collection scans
> db.adminCommand({setParameter:1, notablescan:true})
{ "was" : false, "ok" : 1 }
> db.foo.insert({_id:1, name:false})
> db.foo.find()
{ "_id" : 1 , "name" : false }
> db.foo.find({name:true})
error: { "$err" : "table scans not allowed:test.foo", "code" : 10111 }
> db.adminCommand({setParameter:1, notablescan:false})
{ "was" : true, "ok" : 1 }
> db.foo.find({name:true})

Options

option	value	description	version available
syncdelay	number	period between memory flushes	1.8
logLevel	int (0-5)	sets logging level	1.8
traceExceptions	true/false	logs stack trace on assert/error	2.1
quiet	true/false	sets logging quiet mode (more details)	1.8
notablescan	true/false	causes error if a table scan is required	1.8
journalCommitInterval	number (1-500 ms)	journal (group) commit window	1.9.1

Getting Parameter States

Much like the ability to set runtime parameters you can also get them.

> db.adminCommand({getParameter:1, syncdelay:true})
{ "syncdelay" : 60, "ok" : 1 }

setParameter Command

Setting Runtime Parameters

Options

Getting Parameter States

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