Question about 'by Unpin'

Hello,

Background:

Sybase ASE 15.0.3 running on Solaris 10 platform with data devices on SAN.

A weekend maintenance job drops and creates each index in the database, one index at a time. Nothing else is running at that time; 1 spid that is rebuilding this.

Here is an excerpt of the sp_sysmon output captured during this activity:

Transaction Management

----------------------

  ULC Flushes to Xact Log         per sec      per xact       count  % of total

  -------------------------  ------------  ------------  ----------  ----------

    by Full ULC                       0.3           3.8         282       0.7 %

    by End Transaction                1.1          12.2         914       2.3 %

    by Change of Database             0.0           0.1           5       0.0 %

    by Single Log Record              7.5          84.1        6309      15.5 %

    by Unpin                         39.4         440.9       33068      81.4 %

    by Log markers                    0.0           0.3          23       0.1 %

  -------------------------  ------------  ------------  ----------

  Total ULC Flushes                  48.3         541.3       40601

Are these high numbers normal for a single process building one index at a time?

Thanks in advance.

Anil