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From: Denis Magda <dmagda@gridgain.com>
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Subject: Re: Ignite performance improvements
Date: Thu, 16 Jun 2016 20:19:06 +0300
References: <1465901662511-5623.post@n6.nabble.com> <1465919955017-5632.post@n6.nabble.com> <CADez4_WNAp8FGZh8XVg-WgWF3a3TfkV1aoBVVmbQ=OoerBOhDw@mail.gmail.com> <1466075216557-5680.post@n6.nabble.com> <CADez4_XyoVy0p=rcUvy+=iMu_+d86oyjJb6WHkOt1wKe1RUX7g@mail.gmail.com> <1466094586534-5684.post@n6.nabble.com>
To: user@ignite.apache.org
In-Reply-To: <1466094586534-5684.post@n6.nabble.com>
archived-at: Thu, 16 Jun 2016 17:19:21 -0000


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Optimistic should show better performance than pessimistic transactions.

The main point about OPTIMISTIC READ_COMMITTED is that during a commit =
it=E2=80=99s not checked if an entry value has been modified since the =
first read or write access and an optimistic exception is never raised. =
However OPTIMISTIC SERIALIZABLE will detect such a situation and throw =
the optimistic exception allowing you to perform a transaction one more =
time.

You can read more on optimistic modes here:
=
https://apacheignite.readme.io/v1.6/docs/transactions#optimistic-transacti=
ons =
<https://apacheignite.readme.io/v1.6/docs/transactions#optimistic-transact=
ions>
=
https://apacheignite.readme.io/v1.6/docs/transactions#deadlock-free-transa=
ctions =
<https://apacheignite.readme.io/v1.6/docs/transactions#deadlock-free-trans=
actions>

=E2=80=94
Denis

> On Jun 16, 2016, at 7:29 PM, amitpa <amitpa@nrifintech.com> wrote:
>=20
> Does OPTIMISTIC Serializable give better performance?
>=20
>=20
>=20
> --
> View this message in context: =
http://apache-ignite-users.70518.x6.nabble.com/Ignite-performance-improvem=
ents-tp5623p5684.html
> Sent from the Apache Ignite Users mailing list archive at Nabble.com.


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Optimistic should show better performance than pessimistic =
transactions.<div class=3D""><br class=3D""></div><div class=3D"">The =
main point about OPTIMISTIC READ_COMMITTED is that during a commit =
it=E2=80=99s not checked if an entry value has been modified since the =
first read or write access and an optimistic exception is never raised. =
However OPTIMISTIC SERIALIZABLE will detect such a situation and throw =
the optimistic exception allowing you to perform a transaction one more =
time.</div><div class=3D""><br class=3D""></div><div class=3D"">You can =
read more on optimistic modes here:</div><div class=3D""><a =
href=3D"https://apacheignite.readme.io/v1.6/docs/transactions#optimistic-t=
ransactions" =
class=3D"">https://apacheignite.readme.io/v1.6/docs/transactions#optimisti=
c-transactions</a></div><div class=3D""><a =
href=3D"https://apacheignite.readme.io/v1.6/docs/transactions#deadlock-fre=
e-transactions" =
class=3D"">https://apacheignite.readme.io/v1.6/docs/transactions#deadlock-=
free-transactions</a></div><div class=3D""><br class=3D""></div><div =
class=3D"">=E2=80=94</div><div class=3D"">Denis</div><div class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Jun 16, 2016, at 7:29 PM, amitpa &lt;<a =
href=3D"mailto:amitpa@nrifintech.com" =
class=3D"">amitpa@nrifintech.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div class=3D"">Does =
OPTIMISTIC Serializable give better performance?<br class=3D""><br =
class=3D""><br class=3D""><br class=3D"">--<br class=3D"">View this =
message in context: <a =
href=3D"http://apache-ignite-users.70518.x6.nabble.com/Ignite-performance-=
improvements-tp5623p5684.html" =
class=3D"">http://apache-ignite-users.70518.x6.nabble.com/Ignite-performan=
ce-improvements-tp5623p5684.html</a><br class=3D"">Sent from the Apache =
Ignite Users mailing list archive at <a href=3D"http://nabble.com" =
class=3D"">Nabble.com</a>.<br =
class=3D""></div></div></blockquote></div><br =
class=3D""></div></body></html>=

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