MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 12/02/00 through 12/08/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,112 2,769 3,881
Davis 2,203 344 2,547
Irvine 881 0 881
Los Angeles 156 716 872
Riverside 648 162 810
San Diego 416 204 620
San Francisco 338 0 338
Santa Barbara 491 298 789
Santa Cruz 340 232 572
LBL 0 117 117
LLL 0 121 121
Other - UC 34 286 320
CSL 0 185 185
CSU n/a 150 150
Other-Non-UC n/a 4,514 4,514
_______ ______ _____
6,619 10,098 16,717
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 269 921 5,273
2-4 a.m. 170 686 3,984
4-6 a.m. 191 688 4,394
6-8 a.m. 442 1,194 9,825
8-10 a.m. 1,920 5,463 42,415
10-12 a.m. 3,034 10,677 81,843
12-2 p.m. 2,946 9,465 69,679
2-4 p.m. 3,520 11,199 87,104
4-6 p.m. 2,357 7,106 51,035
6-8 p.m. 914 2,912 26,257
8-10 p.m. 561 1,411 10,713
10-12 p.m. 393 1,133 9,183
__________ __________ __________ _________________
Total: 16,717 52,855 401,705
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,001 7,445 10,446
Davis 7,747 1,303 9,050
Irvine 2,992 0 2,992
Los Angeles 396 1,661 2,057
Riverside 2,085 333 2,418
San Diego 1,411 431 1,842
San Francisco 600 0 600
Santa Barbara 1,774 659 2,433
Santa Cruz 1,682 617 2,299
LBL 0 157 157
LLL 0 432 432
Other - UC 30 1,441 1,471
CSL 0 284 284
CSU n/a 450 450
Other-Non-UC n/a 15,924 15,924
_______ ______ _____
21,718 31,137 52,855
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 25,419 56,344 81,763
Davis 46,809 6,258 53,067
Irvine 23,301 0 23,301
Los Angeles 2,709 20,876 23,585
Riverside 13,731 2,945 16,676
San Diego 8,552 5,165 13,717
San Francisco 4,250 0 4,250
Santa Barbara 12,590 5,506 18,096
Santa Cruz 9,611 4,547 14,158
LBL 0 1,511 1,511
LLL 0 3,188 3,188
Other - UC 278 6,817 7,095
CSL 0 2,573 2,573
CSU n/a 3,399 3,399
Other-Non-UC n/a 135,326 135,326
_______ ______ _____
147,250 254,455 401,705
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 2.1
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 1.4
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 8:21
Average session length (minutes:seconds) 13:00
Longest session recorded (minutes:seconds) 550:48
Average number of searches completed per session 3.1
Retrievals per search - median 2.0
Retrievals per search - average 72.7
Retrievals per search - standard deviation 1225.4
Percent of searches completed with 0 results 27.9%
Percent of searches entered that are long 4.2%
Percent of long searches completed
(includes partial results) 62.7%
Commands entered, by type, excluding errors:
Total Percentage
FIND 51,215 34.9%
DISPLAY (excluding automatic displays) 46,688 31.9%
ACFIND 20 0.0%
BROWSE 320 0.2%
SELECT 290 0.2%
HELP 1,410 1.0%
EXPLAIN 1,326 0.9%
SET/RESET 3,782 2.6%
SHOW 402 0.3%
AT 2,816 1.9%
ADD ON (AND, OR, AND NOT) 1,593 1.1%
LOGON or LOGOFF 27,304 18.6%
COMMENT 19 0.0%
SAVE 1,274 0.9%
USE 1,194 0.8%
OTHER 6,881 4.7%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 7,731 14.4% 1,880 24.3% 11 104.3 573.3
AUTHOR 2,616 4.9% 632 24.2% 12 135.5 674.0
CORPORATE AUTH 504 0.9% 176 34.9% 27 490.9 1816.6
EXACT CA 12 0.0% 1 8.3% 130 769.4 1345.3
TITLE WORD 13,999 26.1% 4,395 31.4% 4 43.9 267.6
EXACT TITLE 7,390 13.8% 2,314 31.3% 2 21.0 121.4
TITLE -> TW 1,363 2.5% 378 27.7% 9 66.2 256.6
TITLE -> XT 1,614 3.0% 800 49.6% 1 7.6 43.6
SUBJECT 3,535 6.6% 1,390 39.3% 44 452.5 3958.3
EXACT SUBJECT 180 0.3% 43 23.9% 61 434.7 1067.3
PERIODICAL 8,176 15.2% 1,576 19.3% 5 94.2 1324.5
EXACT PE 2,846 5.3% 376 13.2% 3 20.5 257.9
RPE 4 0.0% 3 75.0% 41 41.0 0.0
XRP 2 0.0% 0 0.0% 5 5.0 2.8
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 71 0.1% 8 11.3% 48 249.5 744.5
DATE 719 1.3% 171 23.8% 3 68.1 365.7
FORM 792 1.5% 190 24.0% 16 653.7 6768.7
NUMBER* 42 0.1% 9 21.4% 1 801.3 4569.9
MUSIC* 31 0.1% 19 61.3% 56 157.3 160.2
SERIES 1,195 2.2% 401 33.6% 4 71.3 342.3
UNIFORM TITLE 9 0.0% 5 55.6% 38 41.3 28.1
Other indexes 810 1.5% 340 42.0% 1 22.6 246.5
* Number indexes include REPORT NUMBER STOCK NUMBER,
GOVERNMENT DOCUMENTS, and GPO ITEM NUMBER;
Music indexes include MUSICAL KEY, MUSIC PUBLISHER, and THEMATIC
By number of indexes:
Multiple 3,069 6.1% 892 29.1% 4 78.3 805.5
Single 47,327 93.9% 13,282 28.1% 5 103.9 1498.5
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 33 11.1% 3 9.1% 6 24.2 46.1
CORPORATE AUTH 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 234 78.5% 66 28.2% 32 92.4 138.1
EXACT SUBJECT 18 6.0% 2 11.1% 46 140.1 219.5
UNIFORM TITLE 1 0.3% 1 100% 0 0.0 0.0
SERIES 12 4.0% 1 8.3% 10 75.1 95.5
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 311 100% 73 23.5% 22 84.6 136.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.8%
BRIEF 66.5%
LONG 11.5%
MARC 3.3%
FIELDS 2.9%
TAG 2.5%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 2.5%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 8.0%
Ten most frequent errors:
1. NS command - no next screen 28.9%
2. First word of command is invalid 27.6%
3. FIND command with invalid index name 13.4%
4. DISPLAY command contains invalid word 3.9%
5. KW search in database w/o KW index 2.9%
6. Search term missing from search command 2.9%
7. PS command - no previous screen 1.8%
8. DISPLAY command - no FIND results 1.6%
9. Valid command at an inappropriate time 1.5%
10. Max. # of ports to a Z39 db are in use 1.2%
11. All others 14.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 26.2%
2. FIND 14.9%
3. INDEXES 7.3%
4. COMMAND WORDS 6.1%
5. PASSWORDS 4.6%
6. Unrecognized term 3.8%
7. DATABASES 2.2%
8. ADD-ON SEARCH 2.0%
9. LOCATE (PE DB) 1.9%
10. NRLF 1.6%
11. All others 29.4%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.2%
2. First word of command is invalid 14.1%
3. FIND command with invalid index name 11.9%
4. DISPLAY command - middle of >1 screen 4.4%
5. FIND command retrieves >1 book 2.9%
6. DISPLAY command-first of >1 screen 2.7%
7. NS command - no next screen 2.6%
8. KW search in database w/o KW index 2.6%
9. TW search with zero results 2.5%
10. DISPLAY command-complete in one screen 2.1%
11. All others 31.0%
Ten most frequent SHOW requests:
1. HISTORY 35.2%
2. TIME 27.3%
3. SEARCH 9.6%
4. GLOSSARY 6.3%
5. SETTINGS 2.5%
6. MAIL STATUS 2.0%
7. MEDLINE NEWS 1.3%
8. SYSTEM NEWS 1.0%
9. LOCATION 0.8%
10. STANFORD UNIVERSITY PASSWORDS 0.8%
11. All others 13.2%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)