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From Damien Katz <dam...@apache.org>
Subject Re: gen_server timeout after compaction patch
Date Tue, 12 Oct 2010 15:47:23 GMT
Looks good to me.

-Damien

On Oct 12, 2010, at 8:42 AM, Filipe David Manana wrote:

> (previous mail got messed up)
> 
> Sometimes (too often actually), after compacting a large DB (6,5Gb), I
> get gen_server call timeouts (calls to couch_db gen_server, message
> {db_updater, Db}). Resulting in big stack traces and a restart of the
> couch_server process. The following 1 line patch fixes it:
> 
> 
> diff --git a/src/couchdb/couch_db_updater.erl b/src/couchdb/couch_db_updater.erl
> index 93faba0..48d25db 100644
> --- a/src/couchdb/couch_db_updater.erl
> +++ b/src/couchdb/couch_db_updater.erl
> @@ -187,7 +187,7 @@ handle_cast({compact_done, CompactFilepath},
> #db{filepath=Filepath}=Db) ->
>         couch_file:delete(RootDir, Filepath),
>         ok = file:rename(CompactFilepath, Filepath),
>         close_db(Db),
> -        ok = gen_server:call(Db#db.main_pid, {db_updated, NewDb2}),
> +        ok = gen_server:cast(Db#db.main_pid, {db_updated, NewDb2}),
>         ?LOG_INFO("Compaction for db \"~s\" completed.", [Db#db.name]),
>         {noreply, NewDb2#db{compactor_pid=nil}};
>     false ->
> 
> 
> 
> anyone against committing this?
> 
> 
> 
> On Tue, Oct 12, 2010 at 4:40 PM, Filipe David Manana
> <fdmanana@apache.org> wrote:
>> Hi all,
>> 
>> I have a large DB (about 6,5 Gb after compaction) that every time it's
>> compacted, immediately
>> 
>> 
>> diff --git a/src/couchdb/couch_db_updater.erl b/src/couchdb/couch_db_updater.erl
>> Sometimes (too often actually), after compacting a large DB (6,5Gb), I
>> get gen_server call timeouts (calls to couch_db gen_server, message
>> {db_updater, Db}). Resulting in big stack traces and a restart of the
>> couch_server process. The following 1 line patch fixes it:
>> 
>> index 93faba0..40f393e 100644
>> --- a/src/couchdb/couch_db_updater.erl
>> +++ b/src/couchdb/couch_db_updater.erl
>> @@ -187,7 +187,7 @@ handle_cast({compact_done, CompactFilepath},
>> #db{filepath=Filepath}=Db) ->
>>         couch_file:delete(RootDir, Filepath),
>>         ok = file:rename(CompactFilepath, Filepath),
>>         close_db(Db),
>> -        ok = gen_server:call(Db#db.main_pid, {db_updated, NewDb2}),
>> +        ok = gen_server:call(Db#db.main_pid, {db_updated, NewDb2}, infinity),
>>         ?LOG_INFO("Compaction for db \"~s\" completed.", [Db#db.name]),
>>         {noreply, NewDb2#db{compactor_pid=nil}};
>>     false ->
>> 
>> 
>> Anyone against committing it?
>> 
>> cheers
>> 
>> --
>> Filipe David Manana,
>> fdmanana@gmail.com, fdmanana@apache.org
>> 
>> "Reasonable men adapt themselves to the world.
>>  Unreasonable men adapt the world to themselves.
>>  That's why all progress depends on unreasonable men."
>> 
> 
> 
> 
> -- 
> Filipe David Manana,
> fdmanana@gmail.com, fdmanana@apache.org
> 
> "Reasonable men adapt themselves to the world.
>  Unreasonable men adapt the world to themselves.
>  That's why all progress depends on unreasonable men."


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