Re: [HACKERS] Re: [HACKERS] Re: [HACKERS] 答复：[HACKERS] 答复：[HACKERS] about fsync in CLOG buffer write

On 2015-09-09 10:46:47 -0400, Robert Haas wrote: > Well, if you're filling ~1 clog page per second, you're doing ~1 fsync > per second too. Or if you are not, then you are thrashing the > progressively smaller and smaller number of clean slots ever-harder > until no clean pages remain and you're

[HACKERS] Re: [HACKERS] Re: [HACKERS] 答复：[HACKERS] 答复：[HACKERS] about fsync in CLOG buffer write

On Wed, Sep 9, 2015 at 10:35 AM, Tom Lane wrote: > Robert Haas writes: >> ... How often such a workload actually has to replace a *dirty* clog >> buffer obviously depends on how often you checkpoint, but if you're >> getting ~28k TPS you can completely