MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 01/13/01 through 01/19/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 64 838 902
Davis 384 23 407
Irvine 262 0 262
Los Angeles 26 289 315
Riverside 32 64 96
San Diego 43 258 301
San Francisco 179 0 179
Santa Barbara 32 139 171
Santa Cruz 35 75 110
LBL 0 122 122
LLL 0 51 51
Los Alamos n/a 0 0
Other - UC 8 43 51
U.S. Forestry 0
Other-Network UC n/a 437 437
_______ ______ _____
1,065 2,339 3,404
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 65 203 1,953
2-4 a.m. 44 167 1,887
4-6 a.m. 41 146 1,243
6-8 a.m. 119 294 2,259
8-10 a.m. 390 1,096 10,986
10-12 a.m. 650 1,823 18,991
12-2 p.m. 540 1,560 14,501
2-4 p.m. 642 1,647 33,668
4-6 p.m. 496 1,287 32,062
6-8 p.m. 220 688 6,162
8-10 p.m. 122 379 3,841
10-12 p.m. 75 235 3,248
__________ __________ __________ _________________
Total: 3,404 9,525 130,801
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 148 2,326 2,474
Davis 1,094 89 1,183
Irvine 652 0 652
Los Angeles 118 807 925
Riverside 52 150 202
San Diego 107 599 706
San Francisco 383 0 383
Santa Barbara 73 377 450
Santa Cruz 64 206 270
LBL 0 346 346
LLL 0 588 588
Los Alamos n/a 0 0
Other - UC 19 330 349
U.S. Forestry 0
Other-Network UC n/a 997 997
_______ ______ _____
2,710 6,815 9,525
Number of FIND commands by database
CC database 9,292
CCT database 233
Total number of FIND commands 9,525
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,125 24,832 25,957
Davis 46,260 780 47,040
Irvine 6,177 0 6,177
Los Angeles 1,230 7,975 9,205
Riverside 149 1,563 1,712
San Diego 577 6,185 6,762
San Francisco 3,005 0 3,005
Santa Barbara 598 4,888 5,486
Santa Cruz 830 2,519 3,349
LBL 0 3,571 3,571
LLL 0 5,754 5,754
Los Alamos n/a 0 0
Other - UC 188 3,441 3,629
U.S. Forestry 0
Other-Network UC n/a 9,154 9,154
_______ ______ _____
60,139 70,662 130,801
Number of Records Displayed by database:
CC database 121,011
CCT database 9,790
Total number of Records Displayed 130,801
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 94.9%
Percent of CCT sessions 5.1%
Percent of searches done in the CC database 97.6%
Percent of searches done in the CCT database 2.4%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 4.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.0
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 586:19
Average number of searches completed per session 2.9
Retrievals per search - median 10.0
Retrievals per search - average 463.6
Retrievals per search - standard deviation 4301.7
Percent of searches completed with 0 results 24.1%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 65.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,742 37.2%
DISPLAY (excluding automatic displays) 6,862 29.2%
HELP 174 0.7%
EXPLAIN 258 1.1%
SET/RESET 1,316 5.6%
SHOW 44 0.2%
ADD ON (AND, OR, AND NOT) 550 2.3%
LOGON or LOGOFF 4,101 17.4%
COMMENT 0 0.0%
SAVE 367 1.6%
USE 9 0.0%
OTHER 1,098 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 AUTHOR 4,578 45.6% 659 14.4% 31 192.8 746.8
TITLE WORD 2,819 28.1% 858 30.4% 15 800.9 6855.8
EXACT TITLE 79 0.8% 40 50.6% 1 3.9 5.3
JOURNAL 433 4.3% 192 44.3% 362 3609.0 12674.3
EXACT JOURNAL 543 5.4% 356 65.6% 51 2378.2 7547.4
SUBJECT CAT 93 0.9% 8 8.6% 10 41.3 100.9
SUBFILE 20 0.2% 2 10.0% 49 515.9 1343.0
PUBLICATION TYPE 36 0.4% 14 38.9% 11 44.1 96.6
LANGUAGE 16 0.2% 1 6.3% 84 313.9 472.0
DATE 122 1.2% 21 17.2% 12 107.0 225.8
ADDED 525 5.2% 388 73.9% 20 34.0 42.7
PERIODICAL 241 2.4% 36 14.9% 5 116.3 893.9
EXACT PE 67 0.7% 9 13.4% 3 6.9 8.8
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 457 4.6% 127 27.8% 19 1715.0 8292.6
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 1,288 14.8% 625 48.5% 10 54.5 260.6
Single 7,418 85.2% 1,453 19.6% 31 702.3 5336.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.3%
SHORT 80.1%
LONG 5.8%
FIELDS 2.2%
PERIODICALS 6.0%
COMMENTS 0.0%
Other 1.6%
2.1 CCT Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 55:22
Average number of searches completed per session 1.3
Retrievals per search - median 47.0
Retrievals per search - average 483.5
Retrievals per search - standard deviation 2490.5
Percent of searches completed with 0 results 27.5%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 222 20.3%
DISPLAY (excluding automatic displays) 382 34.9%
HELP 99 9.0%
EXPLAIN 52 4.8%
SET/RESET 124 11.3%
SHOW 17 1.6%
ADD ON (AND, OR, AND NOT) 11 1.0%
LOGON or LOGOFF 153 14.0%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 34 3.1%
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:
JOURNAL 115 51.3% 32 27.8% 113 990.1 4042.7
EXACT JOURNAL 89 39.7% 25 28.1% 100 439.4 956.8
SUBJECT CAT 0 0.0% 0 0.0% 0 0.0 0.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 2 0.9% 0 0.0% 3 2.5 2.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 18 8.0% 3 16.7% 5 155.3 330.5
By number of indexes:
Multiple 2 0.9% 0 0.0% 3 2.5 2.1
Single 220 99.1% 60 27.3% 110 703.9 2982.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
ISSUES 55.9%
SHORT 8.8%
LONG 24.0%
PERIODICALS 7.7%
COMMENTS 0.0%
Other 1.8%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 8.3%
Ten most frequent errors:
1. NS command - no next screen 33.4%
2. First word of command is invalid 26.7%
3. FIND command with invalid index name 9.3%
4. Index invalid in current database 3.9%
5. DISPLAY command - no FIND results 2.8%
6. DISPLAY command contains invalid word 2.3%
7. Search term missing from search command 2.1%
8. PS command - no previous screen 1.9%
9. D ABS command in database w/o abstracts 1.7%
10. Valid command at an inappropriate time 1.4%
11. All others 14.5%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 13.2%
2. FIND (CC DB) 10.3%
3. CC INDEXES 7.1%
4. COMMANDS 6.5%
5. DATABASES 4.8%
6. LOCATE (ARTICLE DBS) 4.5%
7. MAIL 3.5%
8. DISPLAY 3.2%
9. Unrecognized term 2.9%
10. ADD-ON SEARCH 2.9%
11. All others 41.0%
Ten most frequent HELP situations:
1. Help requested from START CC command 13.4%
2. First word of command is invalid 11.3%
3. Help requested from SET DB command 7.2%
4. FIND command with invalid index name 6.5%
5. F/BR with index invalid in current DB 6.5%
6. DISPLAY command - middle of >1 screen 5.0%
7. DISPLAY command-complete in one screen 4.1%
8. NS command - no next screen 3.9%
9. FIND command retrieves >1 book 3.9%
10. DISPLAY command-first of >1 screen 3.9%
11. All others 34.1%
Ten most frequent SHOW requests:
1. HISTORY 31.0%
2. SEARCH 22.4%
3. MAIL STATUS 17.2%
4. CC NEWS 13.8%
5. SYSTEM NEWS 3.4%
6. CC SETTINGS 3.4%
7. 0210 1.7%
8. GLOSSARY 1.7%
9. GLOSSARY A 1.7%
10. SC LIST (CC DBS) 1.7%
11. All others 1.7%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)